Battery-Powered Gravel Cleaner Aquarium Fish Tank Siphon Vacuum Water Change (Only ship to USA) This battery-powered cleaner will clean your gravel and catch dirt without doing a water change It sucks the dirt with water through a filter bag, the dirt will be kept in the filter bag and water will return to the tank It can also be used to siphon the water out for a water change Clean your gravel, siphon the dirt out without requiring a water change Adjustable height by two interchangeable pipes of different length, suitable for both shallow and deep aquarium