Eheim is a world leader in canister filter design and manufacture with proven technology since 1980s These canister are high performance with virtually silent operation. Easy maintenance using unique backwash method, and replaceable media making them suitable for use in freshwater or marine aquariums. Eheim 2217 Classic Canister Filter is suitable for tanks up to 600 litres, with a flow rate of 1,000 litres per hour driven by a 20 watt motor.