Abstract: An aeration and filtration system for eliminating waste products in a fluid body having a surface floor is disclosed. The aeration and filtration system includes a support bed disposed above the surface floor of the fluid body and a filter bed of porous media disposed above the support bed. The system further includes a pump having a plurality of inlets adjacent the fluid body level, at least some of the inlets being a plurality of perforated pipes connected to the pump for drawing fluid to and through the filter bed, and a motor connected to the pump.

Abstract: An aeration and filtering system for an aquarim includes a porous filter bed that is spaced above the tank bottom with pump means located in the chamber defined below the filter bed and having an upper inlet for receiving oxygen-enriched liquid from adjacent the liquid level in the tank and at the same time receiving oxygen-deficient liquid from adjacent the bottom of the tank. These two liquids are then mixed within the pump to provide an oxygen-enriched liquid which is fed through a discharge port that is directed generally parallel to the liquid level and slightly below to provide an exercising environment for aquatic life.