【Quick Water Change】Only two valves and a long hose are needed to quickly complete the water change of the fish tank, and use the pressure of tap water to drain water. This semi-automatic water changer is suitable for medium and large fish tanks..【No Buckets, No Spill, No Noise】Easy to install and simple operation, no bucket required, the dirty water in the fish tank is drawn out under the pressure of tap water, After the drain is completed, just switch the valve to add water..【Gravel Cleaning】 The 16.5inch long cleaning tube has a built-in filter. When draining, gently agitate the gravel to remove the debris. It will not make noise and the fish will not be disturbed..【Suitable for Most Faucets】The package comes with a 3/4" GHT garden hose adapter, a 15/16" threaded faucets adapter, a 55/64" threaded faucets adapter, a 13/16" threaded faucets adapter, and it is suitable for all quick connectors..【New Upgraded Version】The latest generation of HVDI Aquarium water changer,If you want higher quality, easier and more comfortable products, please choose us. Customer Satisfaction is our top priority. Please contact us if you need any assistance.