Aquarium Vacuum Gravel Cleaner Using water pressure, our aquarium gravel cleaner completes suction without electricity. With a built-in filter net, it cleans the gravel without sucking it up, removing fish waste and debris. Three sizes of threaded adapters fit most bathroom, garden, and kitchen faucets. Quick & Efficient Water Changes Quietly Clean Fish Waste and Gravel Fits Most Faucets 30 ft Extra-Long Hose Easy to Assemble and Use VEVOR Fish Tank Water Changer, Simplify Your Aquarium Cleaning Process No electricity needed, utilizes water pressure difference for pumping, while achieving aquarium cleaning. Simply adjust the valve to add water, realizing efficient semi-automatic aquarium water changes. Key Features Quick & Efficient Water Changes: Our aquarium gravel cleaner utilizes the flow rate valve's connection to the gravel pipe and outlet pipe, allowing water to be pumped out using the vacuum pressure generated by water flow. Dirty water flows directly into the sink or bucket,