Aquarium Gravel Cleaner, Aquarium Water Changer With Air Pressure Button Aquariu Easy to use: The aquarium water changer is easy to use and is a new and improved product. When using, hold the handle and manually press it. Water will be automatically sucked into the hard tube and flow out through the hose to quickly clean the aquarium Multi-function: aquarium gravel cleaner can be used to rake gravel (level the ground); Sand and gravel cleaning (remove powder particles); Faecal absorption (clean fish excrement); Quick water change (stronger suction for easy water changing) Ideal for different sizes of tanks: this vacuum gravel cleaner for aquariums connects them and uses them according to the size of your tanks, suitable for different types of larger and smaller tanks. Aquarium siphon water changers operate on the siphon principle, so the water outlet should be at least 19 inches lower than the water inlet. In this way, everything will run smoothly Package includes: 1 * air pressure control mechanism (with a fixed valve); 2 * lengthened air inlet pipe; 1 * Extension Hose Connector; 1 * Water outlet pipe (the water pipe can be cut as needed); 1 * Water Flow Clamp (easy to adjust the water flow)