The Eheim Classic 2217 chamber canister design allows for the greatest flexibility in media set up for biological, mechanical, chemical and absorptive filtration. The flow rate has been calculated to provide the exact balance needed between mechanical/biological long-term filtration and water circulation and oxygen enrichment, resulting in optimum conditions for successful aquarium keeping. The 2217 is suitable for aquariums up to 160 gallons and has a pump output of 264 GPH. Comes complete with media (Ehfisubtrat, Ehfimech and fine and coarse filter pads) and quick disconnect valves. The manufacturer recommends this filter for both freshwater and saltwater applications.