The Eheim AquaCompact 40 is a compact and innovative external filter. It is a combination of an internal and an external filter for small, open aquariums. The flow is easily adjusted using the regulating dial on top of the canister. The unit has an integral prefilter to collect mechanical debris before it reaches the pump which protects it and prolongs the cleaning intervals. A nozzle and spraybar are both included for natural surface movement. Suitable for aquariums of 20-40 litres Output: 350lph Max head: 0.5m Power consumption: 5w Filter canister capacity: 0.8 litres