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.

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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

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