This is a rather difficult classification. By Complete Filter Systems, we are referring to filtration devices that perform more than one class of filtration. Chemical Chemical Filtration refers to the filtration of aquarium water via media, resin or other chemical. This type of filtration usually involves a canister vessel that houses the media.
Water is pumped through the unit via an external pump.
Biological Biological Filtration refers to the curing of the water to remove nitrogen components, mainly ammonia and nitrite. Mechanical Mechanical Filtration involves the removal of particulates in the water, such as dirt and other physical debris. This type of filtration usually involves a canister or hang-on type unit which houses floss or other absorbent material. Ocean Clear Ocean Clear Engineered to be the highest performance water filters in the world at an affordable price. Ocean Clear offers six models, with 25 micron and 50 micron particulate filtration, plus biological and chemical filtration.