Hagen Marina AquaVac with 50 ft hose is a complete gravel cleaner and water changing system. Water pressure from a home faucet and the suction pump drive the AquaVac system, which siphons water out of your aquarium. This system includes all equipment you will need to hook the up to both standard faucets, industrial faucets and outdoor hose faucets.Includes: Brass adapter for standard faucetsFemale hose adapter to connect to most industrial faucets and outdoor hose faucetsValve to regulate the water flow when cleaning or filling your aquariumSuction cup bracket that insure the gravel cleaner stays in place when starting the waterFish guard strainer to ensure the safety of the fish when the aquarium is being drainedGravel guard that ensures that no gravel is trapped in the hose when cleaning the aquarium