【5-in-1 Function】Water Changing: Built-in double airbags, atmospheric cavity, good resilience, effortless operation. Sand Washing and Raking: Aquarium siphon with 3D filter basket net, protect your fish from love and small gravel from the aquarium Suction: The aquarium gravel vacuum is designed with a duckbill suction inlet, making it easier to suck up excrement. 【Easy to Use】 Press the button several times to press the siphon switch, you can stop pressing the inlet pipe The part is filled with water and water will flow out of the outlet pipe continuously, otherwise continue until the water flows out automatically The water outlet should be at least 20 inches deeper than the inlet when using p> 【Wide Application】 The kit is equipped with two 15.7 inch inlet pipes. The installation length can be selected according to the height of the aquarium. It is easy to install and use. Suitable for aquariums of different sizes. 【Prevent clogging】The aquarium gravel filter cleaner can replace the