5 in 1 function Water change: built-in double airbags, atmospheric cavity, good resilience, effortless operation Washing and sand raking: aquarium siphon with 3D filter basket net, protect your fish from love and the fine gravel of the aquarium suction. Suction: aquarium gravel vacuum cleaner equipped with a duckbill suction inlet attachment, and it is easy to suck the excrement Easy to use Press the siphon switch, you can stop pushing after the part of the inlet tube is full of water, and water continuously flows out from the outlet pipe. Check whether it will be automatically. If not, continue to push it. operate until the water flows out automatically. Small debris will be washed away by the current. Please note that the water outlet should be at least 20 inches lower than the inlet when in use Wide ApplicationThe kit is equipped with two 15.7 inch inlet tubes. The installation length can be selected according to the height of the aquarium. it is easy to install and use. fit different size fish tank. Prevent BlockageThe Aquarium Gravel Filter Cleaner can replace water and keep water fresh, with a filter basket in the tube, effectively avoiding blockage by gravel. It effectively separates and removes debris from your aquarium.