Fish Tank Gravel Cleaner Vacuum Pump Water Changer Siphon Hose Filter Aquarium Mini This product is designed by pneumatic siphon principle to help fish friends to facilitate the simple fish tank for water pumping work To replace the ancient water pipe nozzle suction method, so that fish become easier, more safe and sanitary Water absorption can also help to clean sand and debris and stains attached to plants and sand beds Clean, hygienic, no need to mouth water Inlet filter to prevent fish / sand is sucked away