Revolutionary design brought to you by the engineers who developed the Aquaclear filters. The new slim fit hang on filters bring the power of larger multi-stage filtration systems to small easy to use cartridge system. With quick no mess filter cartridges, maintenance is a breeze. All filters are covered by a 2 year warranty. Submersed pump operates quietly and requires no priming. The height is adjustable to adapt to water levels.Strainer spong protects small or baby fish from being drawn into the filter. slim design reduces space behind the aquarium. Adjustable flow control. For aquariums up to 15 gallons with a flow rate of 71 GPH. Includes both a bio cartridge and 2 bio carb cartridges.