You have a few different options when it comes to providing proper filtration for your marine aquarium. The below are the common approaches to filtration in marine aquariums that I have used as well as some pros and cons.
There are three categories of filtration that you need to look at, biological, chemical, and mechanical filtration. Each has a slightly different purpose in your aquarium.
Sometimes there just is no substitute for Mother Nature. You could make an argument that this is one of those times. While the use of algae scrubbers as a form of filtration certainly is not a new concept in the hobby, it remains a very effective and easy approach to reducing nitrates and phosphates from your marine aquarium. I thought I would share my approach to building and using an algae scrubber and what I have learned about some algae scrubber basics