FixtureDisplays Aquarium Water Changer Hose Maintainance System 12209 Features: Innovative auto siphon pump. It comes with a quick and easy on/off flow control valve, which can be used as an integrated gravel/fish strainer. Total length 8' (2.55 meters). Method of use: 1. Submerge gravel vacuum cleaner inside aquarium. 2. Place other end of hose into a bucket. 3. Open up Flow Control Valve. 4. Start Squeezing the auto siphon pump until a siphon is created. 5. Remove fish waste and debris by lowering gravel vaccum on gravel. 6. Adjust Flow control valve as needed for different size aquariums. Shipping to Canada and Mexico: import duty and fees apply.