The Fluval 406 External Canister Filter provides complete, multi-stage filtration for aquariums up to 400 Litres (100 U.S. gallons). The modular design allows for quick and easy maintenance while flexible filter media chambers permit maximum versatility for basic to custom filter media configurations. Features include instant priming, lift-lock clamps that securely lock the cover in place and an Aqua-Stop feature that stops the water flow without the need to disconnect hoses. Backed by a 3-year guarantee.