Features: Innovative Auto Siphon Pump, Quick & Easy On/off flow control valve Intergrated gravel/fish strainer. Total length 8' (2.55 meters) 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.