Eheim Liberty 200 hang-on filter rated for 50 U.S. Gallons. Pump output 200 GPH. Pump uses 6 watts. Advanced 3D pleated cartridge designed for 100% more filtration area. Bio foam cartridges sit in by-pass area to guarantee maximum biological filtration. Water does not flow through Bio foam cartridge. It flows by it for longer contact time and non-blocking effect. Easy impeller removal for cleaning or maintenance. 2 year guarantee.