Marina AquaVac Gravel Cleaner and Water Changer is amazingly easy to use. Simply connect it to your sink faucet, push the vacuum tube into the aquarium gravel bed, and twist the pump valve up to refill your tank. To drain and clean your aquarium, simply twist the pump valve down. No more buckets, no more manual siphoning and swallowing aquarium water, no more leaks and spills. AquaVac is so convenient, you’ll wonder how you ever managed without it. AquaVac comes complete with a 7.6 m (25 ft) hose and adapters for standard household and industrial faucets.