【Easy to use】: Simply insert the Gravel Vacuum for Aquarium filter into the aquarium and gently press the pump. Clean the stains by inserting the filter into the gravel and squeezing the pump to create a siphon, then lifting it slightly so as not to remove the gravel from the aquarium 【Damage-Free Shutoff Value】: Our aquarium vacuum has a shut-off valve that ensures that water does not spill onto the floor after cleaning is complete. The aquarium siphon pump can be used around a carpet without fear of spilling water. 【Integrated gravel / fish filter】: Easy flow adjustment so that gravel and sand remain in the tank and are not siphoned off. 【Portable and Safe】: It is lightweight, fits 20-40 gallon aquariums, and protects your fish from being scared when changing water, BPA free. 【Convenient】: you can easily remove it in pieces and clean it. Product description Product functions: Clean, sanitary, easy to handle with ease. Change the water, wash the sand, clean, three in one and one tool