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 Product functions: Clean, sanitary, easy to handle with ease. Change the water, wash the sand, clean, three in one and one tool has three functions. There is a multi-hole filter net in the water inlet. It effectively prevents sand and stone, fish and aquatic plants from being inhaled during water exchange;At the same time, let the water in the tank, fish manure and other debris to be drained out through the filter net, then sucked into a flexible hose and drained, in order to get the results of the water change , sand washing and decontamination Product Product name: Gravel cleaning for aquarium Total length: 7.5ft / 90.6inch / 230cm Pipe diameter: 0.7inch / 1.8cm Water inlet (main part) Diameter: 2.36inch / 6cm Water outlet diameter (tap): 0.47inch / 1.2cm Gross weight: 510g How to use: 1. Tear off the outer packaging 2. Install the head on the pipe (tighten the screw connection), then place it in the aquarium 3. Open the tap and put it in a bucket 4. Press the air cavity several times until the water comes out automatically 5. Free your hands and youre done Please note 1. The outlet must be lower than the water level of the inlet so that fluids can flow automatically. Larger airbag, better performance Bigger airbag, water flows faster and more efficiently Tap for water flow adjustment Easier to control the water flow, dont worry about getting your carpet wet. Environmental pipe Wider 0.7inch diameter, make it more efficient for water change. thickness 0.1inch guaranteed strength. Large suction cup with net filter Makes water change and gravel cleaning easier. Safer for your fish when you change the water and clean the gravel Packing List 1x aquarium cleaning siphon