I have received many questions about which type of plumbing pipe and fittings would work best on a aquarium set-up. This article is meant to provide a little more detailed information to supplement the already posted Aquarium Plumbing Article here for those people who would like more detailed information on the commonly used tubing, pipe, and fittings used on sumped marine aquariums.
There are many different types of tubing, pipes, and fittings used in the hobby today.In this article I am only covering the most common types of products used.All the data listed below going to be fairly accurate, but you should assume there is a 10% variance (plus or minus) as many different variables can effect product performance making it very hard to develop a hard fast rule that applies in very situation. Use the below data a guidelines. In additional, products made outside North America may not have been manufactured up to ASTM (American Society for Testing and Materials)or CSA (Canadian Standards Association) standards making those product specifications hard to determine.That is why I always prefer to ensure the plumbing products that I purchase are manufactured to either ASTM or CSA standards to ensure the specifications will be consistent.
And just to clarify the information/data below:
-All measurements are in inches
-All pressure data is listed in PSI (pounds per square inch)
-All information on flow is listed as GHP (gallons per hour)
-Low temperature applications would include all temperatures between 30F/0C and
-Moderate temperature applications would include all temperatures between 80F/26C and 100F/38C
-High temperature applications would include temperatures higher than 100F/38C
-Schedule 40 = standard wall thickness
-Schedule 80 = extra heavy wall thickness
-Stated maximum pressures is assumed to be at maximum temperature
The below listed specifications are based on the pipe of the material type as the fittings designed to be used with each type of pipe will have slightly higher tolerances as compared with the pipe, you can find out more from The CleanUP Guys. In addition,the colors listed are the most common ones, but this can vary in Provence to Provence and State to State based on local building codes.Always read the printing on the pipe and information stamped on to the fittings to verify the type of material you have.
Clear PVC (polyvinyl chloride)Tubing
This is a clear and flexible plastic looking tube that is used in more of a general purpose application. It is very common to find in most hardware and plumbing supply stores.In the aquarium hobby, it is a very affordable option for low pressure and low temperature applications such as a supply and return line for a media reactor, or a low GHP return pump line. The below charts shows the specifications for clear PVC tubing.
ABS (Acrylonitile Butadiene-Styrene)
This is a black ridge tube.It is most commonly used as drainage lines in many single family residential home in North America.>It is very common to find in hardware stores and plumbing supply stores. In the aquarium hobby, it is best suited to be used on drain lines from a main tank to a sump where there are higher flow rates at lower temperatures and lower pressures involved.This typically includes drain lines were the GHP is less than 1,500 to 1,800 GHP. The below chart shows some of the specifications for ABS pipe.
PVC DWV (polyvinyl chloride, Drain-Waste-Vent)
As an alternative to ABS, you can also use PVC DWV.This product is also used in the drainage systems for commercial and residential construction were there will be higher heat levels with minimal pressure. It is more commonly found in a littler gray color. PVC DWV will be a lot more expensive as compared to ABS and you will mostly find these products for sale in plumbing supply stores. It has very similar properties as ABS but is designed to be able to withstand higher heat levels.PVC DWV is also best suited for the same type of aquarium drain lines as ABS. The below chart will show you some of the specifications for PVC DWV pipe.
Flexible PVC (polyvinyl chloride)
This is a flexible and re-enforced PVC tubing product.It is most commonly white in color but is also made in a few other colors like gray and black.The most common application for this is for the re circulation lines on hot tubs and jetted tubs.In the aquarium hobby, you will find this product typically used on drain lines from the main tank to a sump were you need a little bit of flexibility to avoid used a rigid pipe and fitting to help reduce a loss of flow.The smaller diameters (one inch and below) can also be used on return lines were the GPH will not exceed 1,500.Flexible PVC hose is also best used for low temperature applications.This would be my preferred product for moderate flow applications. Flexible PVC tubing is designed to be used with standard (Sch 40) PVC fittings and glue. You will find some of the specifications for flexible PVC in the below chart.
PVC (polyvinyl chloride), Schedule 40
PVC is commonly used for residential and commercial water supply and water drainage applications with low to moderate heat and moderate pressures. It is a very common product to find in most hardware stores and plumbing supply stores and is most commonly found in solid white color. PVC would be about the most common product to find being used on sumped aquarium set-ups due to the fact it can be used for a drain or return line in almost any type of set-up.This too would be my preferred product for drain and return lines for higher and lower flow set-ups.It is about the best product to use for a peace of mind. PVC SCH 40 specifications are listed in the below chart.
PVC (polyvinyl chloride), Schedule 80
This is just a heavy duty version of PVC SCH 40. It is a little harder to find as compared the PVC SCH 40. As this product is more commonly used in commercial applications with higher pressure and lower temperatures conditions exist. This type of PVC is commonly found in a darker gray color. It can be somewhat hard to find in most hardware stores.Typically you might need to go to a plumbing store to find a good selection of PVC SCH 80 pipe and fittings.This also is a lot more expensive than PVC SCH 40.In the aquarium hobby, you would use this product in very high flow applications that would also have higher pressures as well. You will find some of the specifications for PVC SCH 80 in the below chart.
CPCV (Chlorinated polyvinyl chloride) Schedule 40
This product is very similar to PVC SCH 40 but is indented to be used in moderate and high heat applications. It is most commonly found in a lighter gray color very similar to PVC DWV. Typically you would see this being used on hot water supply lines and some drainage applications.In the aquarium hobby you can use this product just as you would PVC, however, it will cost you a little more to do it. The below chart has some of the specifications for CPVC.
CPCV (Chlorinated polyvinyl chloride) Schedule 80
This product is very similar to PVC SCH 80 but will be able to withstand higher temperature ranges at the higher pressure levels.This product is most commonly used as hot water supply lines in commercial applications.I cannot imagine a set-up that would have high levels of heat and pressure requiring this product.You can use CPVC SCH 80 on a drain line or return line of a sumped marine aquarium, but it will cost you more money to use this product. The below charts shows some product specifications for extra heavy CPVC.
There are a seemingly endless number of different types of fittings, each with their purpose. However, all of the fittings can be placed into one of the below 8 categories.
1) Adapters. Adapters are commonly used to go from threaded to solvent end, or solvent end to threaded ends, all available in both male/female ends.You can also get adapters to transition between different material types
2) Bushings. These are used to transition from one size of pipe to another. Bushing will also come in combinations of threaded and solvent ends as well to suit your specific needs/plans
3) Caps/plugs. These are used to close off a pipe or fitting
4) Couplings. These are used to connect two smaller pieces of pip together to make a longer run of pipe
5) Elbows. Just as the name suggests, they are to change the direct of the pipe in a range of angles from 22 degrees to 90 degrees. You can also get them in combinations of threaded/solvent end and male/female ends as well.
6) Flanges. These are commonly used to connect pipe to a flat surface such as the glass of a aquarium or sump, or a larger valve. These too will come in combinations of threaded and solvent applications and may also be left or right hand threaded.
7) Tees. These are used to split the direct of a pipe in two or more directions
8) Unions-. These are type of couplings that are made of two halves with thread together. They allow you to quickly and easily disconnect a part of plumbing set-up and put it back together again. They also come in threaded and solvent combinations
Connecting fittings and pipe.
When using screwed fittings, it is always best to use a Teflon thread tape. This non-adhesive tape will fill in any potential gaps between the threads allowing the threaded connection to remain water tight and avoid any leaks. There are many different types of thread tape, each designed to be used with different types of materials and different applications. The most common type of thread tape that can be used in all the above listed materials will commonly be white in color and will be the most commonly found thread tape in just about any hardware store. This tape is also safe for aquarium use.
When using solvents to “glue” fittings and pipe together, please keep in mind there is a specific solvent designed to be used with each of the different material types listed above. Make sure to double check and ensure you are using the correct solvent for the type of material you are using. Using the wrong solvent can result in the joint developing a leak or even failing over time.
As you may have noticed, all of the outside dimensions of the pipe listed about are all the same (as detailed in the applicable ASTM and CSA standards). If you choose to use combination of different material types you must ensure you are using the correct type of transition solvent designed to be used with both of types of materials. You can commonly find ABS/PVC DVW and PVC/CPVC transition solvents as well as a few other combinations. If you cannot find a transition solvent for both of the material types that you want to use, then you must assume you cannot use them together. When using two different material types, plan your set-up around the lower of the two specifications for the materials you are using.
Adapters. and Bushings.
You can find a lot of other different plumbing products made of many different types of material, such as: Aqua-rise, Corzan PVC, Duraplas ABS, Aquatherm, and XFR PVC.Each of these have very specific uses which make them (in my opinion) not suitable for use in a sumped aquarium from a cost point of view.There are also companies that are starting to develop and market their own pipe products for use in the hobby.The below link shows an example of this.These manufactures state these products are PVC SCH 40 and can be used with regular PVC SCH 40 fittings.I cannot verify if these new products are in fact manufactured up to ASTM or CSA standards so I cannot validate the specifications these products are manufactured to.
In my experience, corals need to be acclimated, just as fish or inverts would need to be when adding them to your aquarium.The below process is what I would typically follow when acclimating corals to my tank.Although I do not quarantine my corals, I will give them a preventative treatment dip to rid them of potential hitch hikers.I also carefully inspect any coral before purchasing it when I buy it from a store or even from another hobbyist.If I do notice hitch hikers on the coral, or the tank the coral doesn’t look healthy to me, I will not buy the coral.This is also the reason why I do not like to buy corals on-line as I want to personally inspect the coral before I decide to buy it. If you do choose to quarantine your corals, I would suggest to use the below process to acclimate the coral to your quarantine tank repeating the same process when you move the coral to your display tank.
Step 1 – Float the bag
I will keep the bag I got the coral in closed and let it float in tank water for about 30 to 45 minutes allowing the temp of the water in the bag to become the same as the tank water.If I am floating the bag in the tank, I will lower the lighting level to about 10% of normal.Most of the time I will float the bag in the sump were the lighting level will be very low just so I do not have to change the lighting in my tank more than what I have to
Step 2 – Remove the coral and water
Once I am confident the temp of the water in the bag matches the tank water, I will remove the coral and the tank/bag water from the store and place them both in a separate container. I have a few different sized containers that I use to accommodate different sizes of corals and different amounts of water.
Step 3 – Acclimate the coral to your water parameters
Now that I have the coral in a different container with the tank water from the store, I will start adding tank water to this container. I will typically add about ½ cup of water about every five minutes or so. Once the container has become full, I will remove and discard about half the water from the container so I can continue adding water from my tank to this container. I will repeat this about three times or until I am comfortable that I have replaced all of the water from the store with water from my tank
Step – 4 Observation
While I am adding water from my tank to the container with the new coral in it, I will be carefully watching the coral for any hitchhikers.
Step -5 Treatment dip
I will always give the corals a preventative treatment with a coral dip before placing them in my display tank.The below is the coral dip that I like to use. Just make sure that whatever coral treatment dip you choose that you careful follow the instructions on the bottle.If I noticed any hitch-hikers while acclimating the coral to the tank water, I will ensure they are removed / killed off by the coral treatment dip.If I see any harmful SPS crabs, I will get a pair of tweezers and manually remove them as these crabs are very hardy and some of them can survive the coral treatment dip.
I can not stress the importance of using a coral treatment dip enough. I once skipped this step and introduced flat worms into my tank. It took me a very very long time and a lot of effort to get the flat worms under control.I will never make that mistake again.So far, I have been very successful keeping hitch hikers out of my tank by using a coral dip.
Step 6 – Add the coral to the tank
Once I am confident the treatment has removed any potential hitch hikers, I will lower the lighting level in the tank to about 1/3 of normal (if not already lowered). Next I will remove the coral from the current container and place it in a second container of water that I just removed from my display tank.The reason for this is to remove any trace amounts of the coral treatment before placing the coral in my tank.I will gently swish it around a little in this second container before removing the coral by hand and placing it in my display tank.All corals will initially be placed on the bottom of my tank
Step 7 – Acclimate the coral to my tank lighting
Now that the new coral is in the tank at a lower lighting level, I will leave the lighting at this current level for a few hours.I will slowly increase the lighting level back to its normal level over the next 2 or 3 hours.Before switching to LEDs, I would place 4 or 5 layers plain of white paper on top of the tank lids to block out some of the light and slowly remove one layer at a time allowing more and more light to get to the tank.
The next day, once the tank lights are on at their normal setting, I will place the coral in its intended spot.If the coral is a sensitive or high light demanding coral requiring it to be placed higher in the tank (closer to the lights), I will take a few days to move it up to its intended spot, placing it a little higher on the rocks until it has reached its intended spot.
NOTE: I will never add any of the water that I used to acclimate a coral back into my tank.Once I am done acclimating the coral, I will top up my tank with some freshly made salt water to replace what I had removed during the acclimation process. I will always discard all water used to acclimate a coral.
Aiptasi sp is a type of pest anemone that infest reef aquariums and it should although beautiful be removed from an aquarium as soon as possible. The longer it takes to start treatment the worse the infection will be. Aiptasia is most often introduced to an aquarium with live rock. The most common species in aquariums is Aiptasia pallida but other species are also regularly introduced.
It is common that beginner reef keepers anxiously is observing their live rock to see what types of life it might have brought with it. One day they see a small baby polyp. The right thing to do at this point is usually to remove it since most polyp hitch hikers are either Aiptasia or the equally problematic Majano Anemone. Most reef keepers do however want to see what it develops into and before long they are the happy owners of a beautiful anemone. Fast forward in time and the reef keeper will before he knows it have a rapidly growing Aiptasia colony and start to realize that he has a problem. At this time it is a lot harder to get rid of the Aiptasia than it would have been if it had been removed straight away. It is therefore important to try to identify any polyp and anemone you see as early as possible. You can read more about identifying Aiptasia further down in the text.
In the wild Aiptasia is a common sea anemone found in temperate and tropical waters. They live in the benthic zone where they can be found growing on mangrove roots and hard surfaces. Many species of Aiptasia contain symbiotic dinoflagellate unicellular algae of the genus Symbiodinium living inside nutritive cells. The algae helps the Aiptasia by providing fats and sugars produced through photosynthesis. In return the Aiptasia provides protection and inorganic nutrients. Some species that feeds on Aiptasia such as the Berghia nudibranch absorbs these algae and benefit from the symbiotic relationship. The algae do however normally survive less than one week after having been absorbed by Berghia nudibranches.
Aiptasia species are hardy and beautiful but they are still considered aquarium pests and it is easy to see why. The Aiptasia is very fast growing and aggressive. If left alone they can quickly out compete everything else living on the live rock. They have stinger cells (filled with nematocysts ) filled with a very potent poison that cause corals and other polyp animals to retreat The Aiptasia is also capable to kill corals, shrimp, crabs, snails and even fish. It is not very common that Aiptasia kills fish or desirable invertebrates but the risk is more than serious enough to warrant their immediate removal and the risk get higher the more the Aiptasia is allowed to spread. Aiptasia stings for both offensive and defensive purposes.
Aiptasia is very hard to remove once established due to their ability to regrow from very small segments left on the rock after the removal of the poly. Each of the small segment regrows into a new polyp. Aiptasia can sometimes regrow from one single cell left on the substrate after the removal of the rest of the polyp.
It is important to identify Aiptasia as early as possible so that treatment can start as early as possible. It is also very important to identify Aiptasia correctly if you want to use biological methods to control the Aiptasia. Berghia nudibranches will as an example only eat Aiptasia and not Majano Anemones. Another type of very common aggressive pest anemone.
It can be hard to identify Aiptasia and other polyps while they are still small but once they are fully formed it gets a lot easier. It can however sometimes still be a challenge.
Aiptasia species looks like small palm trees with a disk of tentacles at the top. The disc contains both long and short tentacles attached at the edges of the disc. In the center of the disk is the mouth. It looks like an elongated slit. The tentacles are usually slender and have very pointed tips. If the tentacles are more chubby with bulbous tips you are most likely looking at the similar but very different Majano pest anemone. The “stalk” or the coelenteron (polyp body) as it is more correctly called of the Aiptasia can grow up to 5 cm / 2 inches long. The disk at the top can grow to be 2 cm / 3/4 inch wide.
The coloration in the Aiptasia is caused by the dinoflagellate alga living in it. The color of the Aiptasia will hence vary with the lighting conditions under which it grows. In a well lit area Aiptasia will usually be dark to greenish brown. The tone of the Aiptasia will grow lighter the less light that is provided. This can give them a tan or even almost transparent look in low light conditions. It is common that the body of the Aiptasia features lightly marked parallel lines. These lines are however not always present. It is also not uncommon that white or light green flecks are present near the tentacles. Juveniles specimens can sometimes be entirely cover in flecks.
The following 16 species of Aiptasia is currently accepted:
There are a number of reason to actively keep and care for Aiptasia. The most common reason is likely as food if you are breeding Berghia nudibranches. Berghia only eat Aiptasia and is commonly sold to control Aiptasia
If you for some reason want to actively keep and care for Aiptasia you will find it to a be a very easy and hardy anemone. That is the reason they are considered a pest. It will not require any special care to grow as long as you keep decent water quality. I do not recommend keeping any other small fish or invertebrate in aquarium where you plan to grow Aiptasia. There is always a risk that they will get killed.
Acquiring Aiptasia can sometimes be hard since no one want to have it in their aquarium. It should however usually not be to hard to get some from an infested aquarist or aquarium store. Worst case scenario you might be able to get some from one of the many Berghia sea slug breeders that sell their slugs online.
Avoid keeping species that are known to eat Aiptasia such as peppermint shrimp and butterfly fish if you want to keep Aiptasia in your aquarium.
Aiptasia can reproduce both sexually and asexually.
Aiptasia will reproduce more asexually during poor conditions such as when under attack from predators, during poor lighting, in low oxygen situations etc. During good conditions they reproduce more sexually. In the wild there is also evidence that the season affects the preferred reproduction method in Aiptasia. Many chemical Aiptasia remedies also causes increased asexual reproduction.
Schlesinger A, Kramarsky-Winter E, Rosenfeld H, Armoza-Zvoloni R, Loya Y (2010) Sexual Plasticity and Self-Fertilization in the Sea Anemone Aiptasia diaphana. PLoS ONE 5(7): e11874. doi:10.1371/journal.pone.0011874
Aiptasia can be a big problem in a reef tank and there are plenty of different methods available for getting rid of Aiptasia ranging from chemical products to spot application with lemon juice. Click to learn more about Aiptasia and how to get rid of Aiptasia. In this article we are going to focus on the Berghia nudibranch and how it can be used to exterminate Aiptasia from your reef.
The Berghia nudibranch is a small nudibranch that is commonly kept in aquariums to control Aiptasia, a type of pest anemone. In is the most commonly kept and sold sea slug in America. Almost all sold specimens are bred in captivity.
The Berghia nudibranch grows to be no more than 20 mm in length and has a soft sensitive body. This species should not be handled more than necessary since it is very easy to harm these fragile creatures.
The Berghia nudibranch kept in aquariums is native to waters around Southern Florida and the Florida keys where it is found in shallow water. It is only one of many species of Nudibranches that eat Aiptasia. It is however the only species of Aiptasia eating sea slug common in the aquarium trade.
The Berghia nudibranch is called the Berghia Nudibranch because it was believed that the Sea slugs kept in aquariums belonged to the species Berghia verrucicornis. This is however not the case. The species commonly kept in aquariums as the Bergia nudibranch or the Berghia sea slug is actually Aeolidiella stephanieae, another species belonging to the same family (but another genus). Aeolidiella stephanieae was described by science in 2005 (Valdés A. (2005). “A new species of Aeolidiella Bergh) . The Berghia nudibranch should in other words more correctly be called the Aeolidiella nudibranch. The common name Berghia nudibranch have however stuck in the trade due to the fact that it had been used for a long time before the sea slug was re-categorized as a new species.
It is not unlikely that it in time will be discovered that there actually is several similar looking species of Berghia nudibranches kept in aquariums to control Aiptasi. I am basing this statement on differences described from observations of the life cycle and reproduction of different nudibranch populations kept in aquariums. Another factor that suggest that there might be several species kept in the aquarium trade is that Aeolidiella stephaniea is said to reach a maximal length of 20 mm, less than one inch while some Berghia Nudibranch populations kept in aquariums reach up to 1 ½ inch in length. Almost twice the length of Aeolidiella stephanieae. It is however also possible that these differences are due to from different environmental factors or that there is different populations originating from different collection sites with different behavior and size although belonging to the same species.
The Berghia has a rather short life cycle. Their development from egg to sexual mature adult takes a mere 60 days at 22°C / 72°F. Warmer temperatures makes them develop faster. Colder water slows down the development. The eggs hatch after about 10-14 days. Some eggs hatch as fully metamorphosed sea slugs and can start searching for food right away. Other eggs hatch in to larvae that float in the water for about 24 hours before they settle down and start their metamorphosis. The metamorphosis usually take about 48 hours and the juvenile Berghia sea slugs usually start crawling looking for food around 24 hours after the metamorphosis. They are usually actively feeding 48 hours after metamorphosis. Juvenile Berghia are usually about 600 microns long when they start feeding actively. The Berghia nudibranch can live about 10 months with a good food supply.
Berghia (Aeolidiella stephanieae) is easy to keep and care for in a reef aquarium as long as there is food, Aiptasia, to eat and the water quality is kept high and stable (<25ppm of nitrates, 0 ammonia and 0 nitrites). They will do well in most established reefs aquarium. Do not get too worried if you do not see much of your Berghia. They are small, primarily nocturnal and in some aquariums with a lot of corals and live rock you might hardly ever see any. If you want to spot them I recommend that you use a flash light to light up Aiptasia infested areas during night time. If your Sea slugs are introduced to the tank correctly you should start to see a reduction in the amount of Aiptasia in a couple of weeks.
Berghia are very small and add a very small bioload to your tank.
It is important to remember that just because a fish or invertebrate is reef safe it does not mean that they will not eat Berghia sea slugs. Many popular fish species do sometimes eat them including some wrasses, filefish, butterfly fish and dottybacks. This is not a complete list of fish that might eat Berghia and it is important that you keep an eye on your tank to see if your sea slugs are being left alone. There is also a lot of invertebrates that will eat them including emerald crabs, sally lightfoot crabs, arrow crabs, pom pom crabs and peppermint shrimps. Emerald crabs seldom eat Berghia if there is plenty of algae around for them to eat.
The fact that peppermint shrimp eat Berghia can be a problem since peppermint shrimp often are added to aquariums to control and eat Aiptasia in reef aquariums. They do however enjoy eating berghia and will therefore need to be removed from the tank before you add the sea slugs. Peppermint shrimps are easy to remove using a trap constructed from a PET bottle. Simple cut the top of the bottle and but it back in backwards to create a entrance that becomes more narrow as they go into the trap. Shrimps will find their way out of the trap if you give them enough time so you will need to to check on and empty the traps on a more or less hourly basis. It is not a problem if you leave it longer but it can take longer before you catch all the shrimp if you do.
It is not uncommon for the Berghia to start breeding in your tank. This is nothing that you have to worry about since most of the eggs will be eaten and the population will only grow as the Aiptasia infestation allow. The slugs will start dying of when the Aiptasia has been removed. They can live for 5-7 days once the Aiptasia has been removed.
Berghia sea slugs only eat Aiptasia. There is no point trying to feed them anything else. They get their color from the Aiptasia they eat. They absorb the pigment from the Aiptasia. If you see Berghia that are completely white than this mean that they haven’t eaten in 24 hours. This means that their either is no more Aiptasia in their tank or (in a large tank) that they cant find them. If this is the case you can help the sea slugs by moving them to the Aiptasia. Remember that they are fragile.
It is important that to remember that they will start dying of once the Aiptasia has been eradicated and that this can cause some stress on the water. If you see an ammonia spike at this point than you know that dying sea slugs are the like reason. It can for this reason be good to reintroduce your peppermint shrimps to the tank 2-3 days after you saw the last Aiptasia. Or ideally 24 hours after your Berghia turns white. (IE haven’t eaten in 24 hours) They can then eat some of the sea slugs before they die of. The Berghia die off will however normally not cause a big problem since they are very small and you should only have a small number of them.
Berghia nudibranch can be rather sensitive when first introduced to a new aquarium and it is important that you acclimatize them well. They should be drip acclimatized for at least two hours before they are put into their new tank. Keep an eye on them during the entire acclimatization process.
If you acquired your Berghia Nudibranches by ordering online they might not have eaten for at least 10-14 hours (sometimes longer) when they arrive in your home. It can therefor be a good idea to feed them during the acclimatization process. Put a small part of Aiptasia in the bag.
Berghia sea slugs are very sensitive to touch and you should never try to move them into the tank by touching them. There is a great risk that you end up damaging them. The best way to move them into your tank is to use a suitable sized pipette and place them directly on the rock in the vicinity of Aiptasia so that they easily can find food.
Turn of the light and filtration system before introducing the slugs. This will give them the ideal conditions to settle in and grab hold of the live rock. It will also make it easier for them to find the Aiptasia. You can turn the light and filter back on one hour after you introduced them.
Aiptasia will eat these sea slugs if they end up in the mouth area of the Aiptasia. It is therefore very important that you make sure not to put the Berghia directly on the Aiptasia when you introduce them to the tank.
Berghia Nudibranches are easy to breed if you keep them in an aquarium with good stable water quality. They will commonly breed in reef aquariums while being used for Aiptasia control. Since you are reading this text we will however assume that you want to breed Berghia on a more productive and more long term level than simply having them spawning in your main tank. The best way to achieve this is to have a tank where you only keep Aiptasia and Berghia (Aeolidiella stephanieae).
The main problem when breeding these Nudibranches is that you need a stable access to Aiptasia anemones since that is all they eat. The Berghia sea slugs are likely to eat all the Aiptasia in the breeding tank so you will need on or two other tanks for growing Aiptasia as food.
Berghia Nudibranches are hermaphroditic but are not capable of asexual reproduction. In other words they are both male and female but need to mate with another specimen to reproduce. Each Berghia will produce between 1000 to 2000 eggs per batch. Almost all eggs will be fertilized. You can read more about the development of the eggs by reading above under Berghia life cycle. It normally takes between 4-6 weeks before you can see the juvenile Berghia with the naked eye.
Berghia is one of the best ways of getting rid of and controlling Aiptasia in a natural way. The sea slugs will find the smallest part of Aiptasia and eat them leaving no trace of them in your tank. You do not have to worry about them growing back unless you reintroduce them into the tank somehow.
Berghia Nudibranches have evolved methods of approaching the Aiptasia that prevent the defensive mechanics of the Aiptasia to kick in. Aiptasia will not attack with their stinger cells nor release planula larva into the water when Berghia slugs approach like they do when other dangers approach. It is believed that this is caused by a the chemical composition of their mucus.
The Berghia nudibranch is able to find all Aiptasia regardless of size using organs called rhinophores and this guarantees that all Aiptasia will be eradicated. Not just larger visible specimens.
It is important to make sure that your aquarium is infested with Aiptasia and not Majano Anemones before you get Berghia. Berghia sea slugs only eat Aiptasia, they do not eat Majano. Both are common pest anemones but the Majano have shorter more stubby tentacles. The tentacles on Aiptasia is longer and more slender.
Berghia can not get into filters and other equipment. It is therefore important that you clean these areas to make sure that no Aiptasia is hiding there.
These sea slugs are not suitable to treat light infestation (less than 10 polyps) in large tanks over 30 gallons. There is a risk that the Berghia will starve before they can find all Aiptasia.
Aiptasia is according to me the best way of getting rid of Aiptasia. I like that it is a natural method and it avoids a lot of the problems that is associated with other methods. Some of the most important benefits with Berghia are:
How many Berghia snails you need to control and eradicate the Aiptasia in you tank depends on how severe the infestation is. You should usually have 8-10 slugs per 100 gallons of water but if you have very severe infestation (more than 100 Aiptasia per 100 gallon) you might want to consider a higher number of snails.
Berghia snails is not a quick solution to Aiptasia control. It is however a natural method that will be able to remove all Aiptasia. The ones you see and the ones you do not see. It usually take a couple of weeks before you start seeing a noticeable difference. In 2-3 months the tank should be completely free of the infestation. Berghia is a great way of getting rid of Aiptasia without having to use chemicals.
Valdés A. (2005). “A new species of Aeolidiella Bergh, 1867 (Mollusca: Nudibranchia: Aeolidiidae) from the Florida Keys, USA”. Veliger 47(3): 218-223.
Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
WoRMS (2013). Aeolidiella stephanieae Valdés, 2005. Accessed through: Tunnel, W.; Moretzsohn, F. (2013) Gulf of Mexico register of marine species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=389717
There certainly can be many conflicting opinions whether or not you can keep certain marine fish (most notably tangs) in certain sized aquariums. This can even become an emotional topic for many hobbyists. However, as the plural of anecdotal is not “fact”, I would challenge some of the commonly accepted facts / opinions that you read about on-line and further suggest to you to research these topics for yourself. In my opinion, completing your own research from credible sources is the only way to demonstrate responsible fish keeping though focusing on the facts. The below is a few examples of how I will approach keeping tangs to help give you better understanding of what I am talking about.
1) Proper Sized Aquarium
Don’t be fooled, conventional rules of thumb on tank size should not be considered a hard fast rules, but only used as a starting point to determine proper tanks size. That is why most people state tank sizes as “minimum aquarium size” and not as “ideal aquarium size”. I have seen tangs which appeared to do well in a 120 gallon tank for many years, and yet I have seen the same type of tang suffer to the point of eventually dyeing in a 230 gallon tank. So which tank is was the correctly sized one? And just to make matters a little more complex, different tangs have different requirements so you do have to keep in mind, not all tangs will have the same needs. How long and wide a tank is along combined with how much swimming space they would need is what you will need to determine in order to find a properly sized tank for the specific tang you would like to keep. I have always found the amount of open swimming space was one of the most critical factors to think about. Having a tang in properly sized tank will do no good if you use up the space in the tank by placing large amounts of rock and/or large amounts of tall corals. In the example I just mentioned above, the 230 gallon aquarium had far too much rock in it (at least in my opinion) and had a lot of extremely large SPS corals which limited the amount of swimming space to less than what was in the 120 gallon tank. That is why I choose to stock based on the open swimming space (open water area) within the tank after I have all my planned rock and corals in there. I will typically refer to published research papers and books written by credible authors in the field when determining the proper aquarium size and swimming space required.
2) So how big will my tang get?
Many sites will list the maximum scientifically measured size of a fish as their adult size. I think it is more realistic to look at the average size of a fish. After all, the tallest person in the world was well over 9 feet tall, yet all of the doorways into our homes we build today are around 7 feet with around 8 to 9 foot tall ceilings inside the home. This doesn’t mean you or I were stunted by our home, just that we are closer to average height as compared to the tallest person in the world. There are a few other factors that also make the average size of a fish size as a better approach to use
– In the wild the more dominant male, or “super male” will tend to get larger than normal which will not occur within a home aquarium
– Fish will not get as large in captivity as they do in the wild. I have read studies that showed fish in captivity typically get to between 66 and 80% of the normal or average size in the wild. These same studies also concluded these same fish were not stunted due to their: healthy appearance, normal behaviors, and long life span.
Once again, I will typically refer to published research papers and books written by credible authors in the field when determining how big a fish will become over time.
3) What about keeping multiple tangs?
For long term success, you should either keep a single tang, or a group of around 5 or more assuming your tank size and filtration can accommodate them. Many different types of tangs will typically not tolerate other tangs of the same species or a species that look very similar to themselves, while others can be just plain bullies. You will always have at least a small element of risk with keeping multiple tangs as these fish can be a lot like people, each with their own personality and disposition. Sometimes you can complete more than enough research but you just won’t know for sure how it will work out until you try it. Just be prepared to watch carefully and react quickly should things not work out the way you expected. Once appropriate tank size, fish size, and swimming space has been validated, you will need to determine what type of territorial needs each fish has if you are keeping more than one, and what would be the best approach to take when adding these fish to your set-up. I would include all fish (and not just tangs) into this part of the process.
Many have suggested keeping tangs in odd numbers, like 5 or 7. I have often wondered about how important this actually is, after all, can tangs count? I would guess the most critical element would be to keep them in higher numbers, the more the better (assuming you are not overstocking the tank as already mentioned). However, I will typically refer to published research papers and books written by credible authors in the field when considering keeping multiple tangs in a single aquarium.
4)Are there other things to consider ?
Putting all personal opinions aside, we can all agree that good aquarium husbandry will be just about the most important aspect of keep in any fish. The two other critical elements that will also have to be considered are:
1) Water parameters
This can be just about the easiest part of your research to complete. As the tangs that I keep come from the in or near our coral reef, I try to keep the water parameters as close as that of the coral reefs as I can. The below link can explain that in a little more detail. The proper diet is also fairly easy to identify with a little research from published research papers and books written by credible authors in the field.
5) How do I know when I have made the correct choices?
When you have completed the proper research, things should be going great and you will be enjoying your aquarium for years to come. So, what does it look like when things are going good? Basically, you should have a healthy fish that looks and acts normal. The below list are just a few things that will give you a indication when things are going well:
-No signs of chronic disease.
-No signs of abnormal coloring or body shape.
-No signs of abnormal behavior.
-Strong appetite when offered a proper diet.
-No signs of abnormal stress, which is typically shown as higher than normal respiration rates.
There can be many different signs to watch for which can be a indication that you may not be providing a proper home for your tang, or any other type of fish as well. You can take the list above and watch for the opposite. However, there are a few other things to watch for that could be a indication your fish is in a aquarium that is too small. These things can include:
-Bent or torn fins.
-Shortened life span.
I’m not trying to make things seem more complicated for you when trying to determine proper aquarium size and environment for your planned fish. I just want to give you some guidelines to think about when completing this research for yourself based on what I have learned completing my own research along the way. There is a lot of information available on line and in forums, but not all of it is good. You need to be able to find credible information from experienced people and start form there. The better quality information that you find, the easier the research will become and you will have a better and healthier aquarium because of it.
Some additional references:
Rating Overview: 4.5 out of 5
Details of my ratings along with the manufacture’s specifications are contained below.
The below is taken directly from the distributor’s website for this skimmer:
SKIMZ specializes in designing and building the most advanced marine equipments for professionals and hobbyists. Their are committed to bringing you the widest range of excellent equipments at an affordable price for your marine and reef aquariums.
SKIMZ Singapore LLP begun in early 2000, focusing the initial years in aggressive product research and development, with the aim of bringing the best possible marine equipment to professionals and hobbyists. Today, Skimz carry the widest range of outstanding equipment to suit your needs. They even customized a whole range of equipment for aquaculture farms and the marine industry.
SKIMZ uses the best material and latest technology in the manufacturing of their equipment. The result: To bring to you equipment of the finest quality! All SKIMZ protein skimmers undergo the prestigious TÜV Rheinland testing, a testimony of quality products meeting the highest technical requirements. SKIMZ strives for continual improvements to our products. Lots of useful information are available on the Skimz website.
two SICCE PSK1200 needle wheel pumps (110V/60Hz) 0.938A/52W
This skimmer is made from taking a Skimz SK251 skimmer (link below) and replacing the original pumps with Sicci PSK1200 pumps.
The below is my own assessment using a CSC 450 in sump skimmer
Price Point (4 out of 5):
While this skimmer is still reasonably priced for a skimmer of this size, it is a little bit lower priced than other skimmers that perform just as well or at least close to the CSC 450 skimmer. You can typically find these skimmers brand new ranging anywhere between $650.00 and $800.00 throughout Canada and the USA.
Ease of Use and Set-up (4 out of 5)
This is not exactly “plug-n-play”, but it is not that hard to set-up and use. The instructions are clear and this skimmer should take you less than 5 minutes to assemble even if you have never assembled a skimmer before. There are a few pictures showing some of the steps involved in stepping up and maintaining this skimmer at the end of this review.
Overall Size (5 out of 5)
This is one of the qualities that I really like about the CSC 450 skimmer. It has a very small foot print as well as being shorter than most other skimmers with similar capacities.
Noise Level (5 out of 5)
This is another good aspect of the CSC 450 skimmer. It makes very little noise when running and I would even say it would be the quietest of the skimmers with this type of capacity, but that is only my opinion.
Ease of on-going Maintenance (4 out of 5)
The one thing that I both like and dislike at the same time is how the CSC 450 skimmer is designed to be taken apart. I do really like how easy it is for everything to come apart and be cleaned very well, but I do not like the amount of screws that are needed to remove in order to take it apart. I find the large size of the cup to be of great benefit to this skimmer. I have it set for a thinner skimate and I have to empty the cup every 2 to 3 days.
Effectiveness of Operation (5 out of 5)
The CSC 450 comes with two Sicci PSK1200 needle wheel pumps which very efficient and top rated skimmer pumps. They can produce a very fine and thick layer of bubbles once the air intake is adjusted correctly. This skimmer is a 6 out of 5 in my books. The only draw-back to this skimmer that I have come across so far is the length of time it took to break in. My skimmer took about 2 weeks to break in and another 2 weeks for me to find the best depth of water for this skimmer to sit in. It can be a very touchy skimmer to set-up, but when it`s broken in and you have it set for your tank, it will perform amazingly well.
I found the best place to start this process is to have the skimmer in 7 inches of water with the gate valve 80% open and both air valves 100% open. After a week of running, adjust the gate valve slowly closing it until you get a good amount of skimate in the cup. If you want a thicker skimate, raise the skimmer slightly so it is sitting in less water. This skimmer safely run in as little as 6 inches of water, and will produce a very thick skimate in lower levels like that.
Likeliness of Recommending this Skimmer to Others (4 out of 5)
This would be one of the true ways to really assess how well this skimmer preformed for anyone. In short, this is among the best of the larger skimmers that I have used and I typically recommend this skimmer to people that have enough room in their budget for one. This is also one of the few skimmers that I would at least somewhat agree with the manufactures recommend tank size for use. I have been using this skimmer on my heavy stocked 180 gallon aquarium with a 100 gallon sump and I am very happy with the performance and resulting water quality. I feel this skimmer would be capable of a handling a larger set-up with a much larger bioload.
Below are a few pictures of when I had set-up my CSC 450 skimmer
And the below picture was taken 3 or 4 days after a skimmer cup cleaning
Common Name: Vampire tang, Lieutenant Tang, Doubleband Surgeonfish
Scientific Name: Acanthurus Tennenti
Reef Safe: Yes
Temperament: Semi Aggressive
Care Level: Moderate
Max Size: 10 inches (8 to 9 inches is more common)
The vampire tang will range in color from light tan to white with an almost black border around the edges of the body. They are also known to have a really nice blue outline around the head and fins. Once the vampire tang reaches adult size, the tailfin will also develop some very nice blue and white coloring and take on a lyre shape. And of course, there are the two dark blue to black markings on the shoulder area just behind the head. As juveniles, they will have a horse shoe shaped marking on their side which will separate into the two dark marking once they start to reach adulthood. These adult markings will also have a very vibrant blue outline to them.
May people find these marking to look like vampire teeth while others will believe the markings look closer to the rank insignia for an army lieutenant. This is how the two most common names for this fish had developed.
Below are a few pictures of my vampire tang. I would guess he is fully grown as he has reached 9 inches in length and has stayed that way for about 2 to 3 years now. My photography skills do not allow me to truly show you how nice this fish really looks. The body on my vampire tang is almost white in color making it hard to me to get a good picture as his body reflects the blue tones of the aquarium lighting which gets picked up by the camera.
Environment and Temperament
Vampire tangs can become semi-aggressive when kept with other tangs of a similar shape, size, and color to them and can also become aggressive with other vampire tangs in the same aquarium. This behavior would be fairly common with most tangs. The vampire tang however is a great fish for a community tank as they will peacefully co-exist with any other types of fish. They are also completely reef safe.
The vampire tang would need an aquarium size of 150 gallons, but would do best in a 180 gallon (or larger) aquarium. The reason for that recommendation is not only based on their average adult size of around 10 inches (give or take), but on their typical behavior as well. They are a very active fish requiring a lot of open swimming space in the tank. This can also make the vampire tang a very entertaining fish to have in a properly sized set-up.
The vampire tang will do best when there are a few suitable hiding spots so they can claim one as their own. As with most tangs, they like to go a hide when they get scared or startled. Having a good amount of live rock in your tank will not only help you to maintain good water parameters, but also provide a more natural environment for the vampire tang.
Recommended water conditions / parameters:
I would refer you to the below article for the typical water conditions that vampire tangs will do best in:
As with most tangs, the vampire tang will accept almost any food you may offer it. However, they are herbivores and will require a diet consisting mostly of sea algaes with some other verities of food on occasion. A good quality flake or pellet food meant for marine herbivores is also a good option for the vampire tang’s main diet.
A reference to consider
Common Name: Orange Shoulder Tang. Orange Spot Tang, Orange Epaulette Tang, Orangeband Surgeonfish
Scientific Name: Acanthurus Olivaceous
Reef Safe: Yes
Temperament: Peaceful to Semi aggressive
Care Level: Easy
Max Size: 12 inches (9 to 10 inches is more common)
The orange shoulder tang will have a different appearance as a juvenile. When in this stage, they will be mostly yellow in color with very subtle and faint blue highlights. The bar shaped marking on the side of their body will be a shade of orange to brown. Once they have reached adulthood, the front half of their body will turn a very light grey color while the back half will be a darker shade of grey. Their tail will develop a lyre shape to it over time as well. The bar marking on the side will turn to a vibrant orange color as well as developing a blue border around it. They will also develop blue and orange highlights around the edges of their body and fins.
The below pictures are of my orange shoulder tang. I would guess he has reached his fully grown adult size of about 10 inches as he has not grown at all in the past 3 or 4 years
Environment and Temperament
Orange shoulder tangs are the least likely to become semi-aggressive when kept with other tangs of a similar shape, size, and color to them. However, there still is a small risk they can become aggressive with other orange shoulder tangs in the same aquarium if not added at the same time and as juveniles. The orange shoulder tang is the least aggressive tang amount all of the larger bodied tangs common in the hobby. They are also a great fish for a community tank as they will peacefully co-exist with any other types of fish. They are typically reef safe when they are kept well fed.
The orange shoulder tang would to best in a tank size of 180 gallons or more. I would not suggest keeping one in an aquarium smaller than 180 gallons. The reason for that recommendation is not only based on their average adult size of around 10 inches (give or take), but on their typical behavior as well. They are a very active fish requiring a lot of open swimming space in the tank.
The orange shoulder tang will require a few suitable hiding spots so they can claim one as their own if spooked or startled. Having a good amount of live rock in your tank will not only help you to maintain good water parameters, but also provide a more natural environment for the orange shoulder tang as they like to pick at algae as it develops on your live rocks. If you are interested you can check this live rock for sale online.
Recommended water conditions / parameters:
I would refer you to the below article for the typical water conditions that orange shoulder tangs will do best in:
As with most tangs, the orange shoulder tang will accept almost any food you may offer it. However, they are herbivores and will require a diet consisting primarily of sea algaes with some other verities of food on occasion. A good quality flake or pellet food meant for marine herbivores is also a good option for the orange shoulder tang’s main diet.
I have read about people offering lettuce to orange shoulder tangs as a part of their diet. I would not recommend this practice. Although the orange shoulder tang will eat it, lettuce will not offer the same required nutrients as compared to marine algaes.
A reference for you consideration
Many hobbyists who are also handy with do it yourself projects will build their own aquarium stands allowing for the exact features, measurements, and overall look they want.
I have always built my stands so I could get a larger sump as well as better internal height for more skimmer options. Below are a few aquarium stands that I have built over the years. If you are somewhat handy at wood working and wood finishing, this should be an easy project for you.
Just a few key things to remember
1 – Make sure the complete edge of the aquarium is supported by the frame of the stand.
2 – Make sure there is direct wood to wood contact from the floor directly straight up to the aquarium.
3 – Assemble the frame together using wood screws and wood glue.
4 – Assemble your stand frame on flooring that you know is level and flat.
5 – Always place a peace of ½ to 1 inch thick rigid foam between the aquarium and the stand.
6 – Carefully plan the height of your stand so you can fit all the equipment inside the stand that you may want.
7- Double check the size / opening for the doors to make sure all the equipment you are planning to up in the stand will fit through the doors.
8- Use the below examples and links at the end of this article to help you plan how to build your tank to ensure it can hold the weight of your full aquarium
As these stands need to hold a lot of weight and must be safe, I do tend to over build them at least a little.
My First Example
The below stand is one that I built for a four foot long 120 gallon aquarium. As I wanted to use a 4 foot long 55 gallon aquarium for the sump, I had to make the stand a few inches longer than four feet. That is why when you look at the below picture of the frame, it will look like it was double framed at both ends.
This is a picture of the frame I built with 2 X 4 peace’s of pine lumber. There were glued together with construction adhesive and screwed with 2 ½ inch construction screws. This is a good example to show what I am referring to when I say direct wood to wood contact from the aquarium frame directly straight down to the floor.
My next step was to cover the frame I made. As I wanted this aquarium stand to match the flooring in the room it was going to sit in, I wanted to cover the frame in ¾ oak. I cut the wood to fit and glued and nailed it to the frame. You can see the openings that I left in the front of the stand for doors to access the sump. The opening on the left hand side is to allow me to remove the sump easily without having to take the tank off the stand. There will also be a door for this end of the stand as well. I left the back of the stand open to allow for greater room when plumbing the sump to the aquarium. I also added some trim to the stand and stained it to match the rest of the furniture in the room it will sit in.
Next I built the all three doors out of the same oak and stained them as well. The whole stand also got 6 coats of the best quality urethane that I could use indoors. I wanted to make sure the wood will be as best protected from moisture that it can be.
Next I moved the stand into place and set-up the entire system.
Once all plumbed and tested, I put the doors on and started to enjoy the aquarium. That stand has now been in use for over two years and has been standing up to the ~1,400 lbs sitting on it as well as the moisture.
I also built a stand for a fresh water sump-less set-up in almost the same way as this first example above. Below are a few pictures of that stand. The biggest difference on the below stand is that I made a solid wood top out of 3/4 inch plywood.
I also used that same design for a stand I built for a older 36 gallon Hagen aquarium that I had a few years back.
As well as using the same stand design for a 33 gallon set-up I put together for my father.
My Second Example
I took a little different approach for my 180 gallon aquarium stand. I doubled up the 2X4s for extra strength. As my sump for this aquarium was going to be in another room, I had no internal height goals to meet, nor did I even need any doors.
The below picture shows the basic frame that I had built. I even added some cross bracing on the up rights along the back and sides of the stand to re enforce the stability.
Next I had to use wood filler on all of the screw holes followed by a lot of sanding. Once sanded, 2 coats of primer and 5 coats of paint were applied before the stand was ready. You can even see the peace of rigid styrofoam on the stand for the tank to sit on.
I then placed the aquarium on the stand, moved it in place, and attached the wood and cloth covers to the openings in the stand. This gave me the look I was wanting. This stand has now been in use for well over a year now and has been able to handle the ~2,200lbs of weight that is sitting on it.
My Third Example
I ran into a very odd challenge with setting up a four foot long, 120 gallon aquarium in our basement. Due to two tight corners, I was limited to the size of stand that I could safety fit through these corners. The problem that I had was that a stand with the required height and width for my sump and skimmer would not fit around those corners. With the hight of the stand being taller than the hight of the aquarium, I could safely move the aquarium down the stairs but not the stand. After giving this a lot of thought, I decided to build a two peace stand that will be held together by a top brace. This would allow me to move the stand down my stairs in two peaces.
I started off by framing each half of the stand. These next two pictures are of the framing. The back of the stand is facing the car in the picture.
The next two are pictures are of the stand after I sheeted it in pine. As I want this stand to have a black finish, I use paint-able wood filler on all the hole and knots in the wood. The opening on the left hand side of the stand is for a large door to remove the sump if I ever need to.
After getting the stand all sanded, primed and painted so I decided to get the top brace peaces cut and make the doors. The below pic shows the top brace peaces sitting in place. The ones on the end were glued & screwed to the top. The ones that run the length of the stand are the ones that hold both pcs of the stand in place
I had to leave a cut out on the back right corner for the drain line. That still leaves 1.75 inches of frame to support the tank in that corner which is more than enough to support the ~1,400 lbs the tank weights. I also wanted a little extra room should I ever need access to the bulk head flange
And one of this stand inplace and in use
The below links can also help you design and plan a aquarium stand
There are a lot of opposing opinions out there about the use of ultraviolet sterilizers (UV sterilizers) which can make it hard to decide if you would need to add one to your set-up. Hopefully this article can help you think through if you want to use a UV sterilizer or not and make an informed decision either way.
The first step in deciding would be to better understand what a UV sterilizer is and how it works
UV sterilizers are a very simply designed type of a filter. They contain a ultraviolet bulb protected by a water tight quartz sleeve. Water inters the sterilizer and passes over the sleeve becoming exposed to the UV light. The strength of the UV bulb can range anywhere from 9 watts to 100 watts in size. Always stick to a good brand name and follow the manufactures recommend bulb sized based on the total water volume in your set-up. Their also two main different designs, a external style filter that requires water to by pumped through it, and a internal (or completely self contained) style were you just place the filter in your aquarium and plug it in.
UV sterilizers will never: replace biological or mechanical filtration, allow you stop completing water changes, or remove excessive nutrients (nitrates and phosphate).
The second step would be to better understand the purpose of a UV sterilizer
You must first decide what you want to achieve with your UV sterilizer as there are two main purposes for setting up a UV sterilizer each of which better suited to different goals and each require a slightly different approach for use. Other than having a properly sized UV bulb, not fully understanding these approaches is the most common cause of not realizing the potential benefits of a UV sterilizer. This first approach is to help control free floating algae and algae spores. This will best be achieved by a higher flow rate through the sterilizer. As these organisms are smaller, they need less exposure time to the UV light when passing through the sterilizer to become effected by it. The second approach is to control free floating parasites. As parasites are larger in size as compared to bacteria, they will require longer exposure to the UV light which can be achieved by reducing the flow rate through the UV sterilizer. By purchasing a good brand name UV sterilizer and following the manufactured recommendations for flow rates, you will be maximizing the effectiveness of the UV sterilizer in either approach.
The third step would be understand the pros and cons of using a UV sterilizer
Based on my experiences using a UV sterilizer on one of my set-ups as well as what I have read, there can be many pros and cons with using a UV on your marine aquarium. The below are just a few of these pros and cons:
-Reduce / control free floating algae and algae spores
-Reduce / control free floating parasites
-Help to reduce the impact of parasite outbreaks, like ick, providing you a better opportunity to treat it.
-Help to keep the water crystal clear and/or eliminate bacteria blooms in the water.
-They will not remove all parasite as they have to be free floating in order to be effected by the UV
-They will not help with the removal of existing algae in the tank and on the rocks.
-UV sterilizers have been reported to affect some chemical compounds affecting some types of aquarium supplements being dosed.
-They can reduce the diversity of free floating microorganisms which some corals and filter feeders need
-UV filters need to be accurately set-up or they will be useless
-Extra on-going maintenance of cleaning the bulb cover and expense of replacing bulbs every 6 to 12 months
-In most situations, the same benefits of using a UV can also be achieved by other methods
-There will be limited impact on ick as they are only free floating for a smaller portion of their life span.
Whether or not you use a UV can be more of a personal preference which is also based on the exact needs of your set-up as no two marine aquariums will ever be alike.