Abstract: An aquarium integrated filter (10) that is designed to maintain the purity, cleanliness and biological health of an aquarium (250). The filter (10) includes within a single enclosure (12) all the filtering elements that are necessary to perform proper filtration of a salt water aquarium. These filters consist of: a coarse pad filter (58), a chemical media filter (70), a fluidized biological bed filter (102), a venturi protein skimmer (124), a wet/dry filter (174) and a micron filter (180). The enclosure (12) also includes a filter outlet fitting (28) and a filter inlet fitting (52). Likewise, the aquarium includes a tank inlet fitting (252) and a tank outlet fitting (254). To connect the aquarium integrated filter (10) to the aquarium (250), the filter outlet fitting (28) is connected, via a primary water pump (206), to the tank inlet fitting (252) and filter inlet fitting (52) is connected directly to the tank outlet fitting (254).