Hang-on aquarium power filters with multi-stage filtrationAquarium filters with easy-change cartridges and media containersPower filters with adjustable dual intake system for ultimate water qualityAquarium power filters combine three filtration styles with power and flexibility. Each Emperor BIO-Wheel powerfully cleans your aquarium water through mechanical, chemical, and biological filtration mechanisms to remove debris, water impurities, and dangerous toxins. Redesigned models feature: BIO-Wheel filtration, refillable coarse media containers, and an easy-access, hang-on design with a flip-top hinged cover, plus an adjustable intake system that can simultaneously filter water from both the lower and middle levels of the aquarium for boosted filtration and water circulation. Epoxy-sealed, moisture-proof motor ensures safe operation. The 400 filters up to 400 gallons per hour through two BIO-Wheels. It includes two each of the Rite-Size "E" Filter Cartridges and 4 ounce media containers. The 280 filters up to 280 gph through one BIO-Wheel. It includes one each of the Rite-Size "E" Filter Cartridge and 4 ounce coarse media container. Dual strainer/intake system simultaneously filters water from two levels of the aquarium: The lower (where debris, food, and fish waste settle) and the middle (where medications, additives, food particles, and waste float). In addition to cleaning the water, this process also creates greater water circulation. Plus, this improved circulation works to better mix the water and helps regulate water temperature and oxygenation levels, while preventing the "pooling" of toxins and additives within one level or area of the aquarium. For freshwater or marine aquariums. Replacement filter cartridges and replacement parts available.EmperorSizeFlow RateRite-Size FilterIdeal for40016-1/2" w x 6-1/2" d x 10-1/2" h400 gph2, "E" Cartridges30-80 gallon28010" w x 6-1/2" d x 10-1/2" h280 gph1, "E" Cartridge25-50 gallonTips from our Techs BIO-Wheels spin

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