3 in1 Multi-function tool: This fish tank siphon cleaning tool can be used for water changes, sand washing and dirt suction. No need to touch dirty water with your hands. Unique design: This aquarium gravel & sand cleaner is the latest design with more power suction power to provide a better user experience. The patented handle design provides a more comfortable grip. Adjustable Handle Design : Clean and Fill Aquarium Maintenance System with 2 extension tubes for a total length of 40.9 inch. It can be extended from 22.4 inch to 40.9 inch. Applied to depth below 31.5inch aquariums. ATTENTION: 1.The principle of this sand cleaner is gravity. The water outlet must be at least 19.7 inch lower than the water inlet when you use this gravel cleaner. 2.Due to manual measurement and length conversion, 0.1-0.5in error is allowed, please be aware. 3.Due to the different strength of each person, and the size and water depth of the fish tank, there is no clear Drain Flow Rate. Please refer to the actual operation. 4.When washing sand (not recommended for very fine sand). If the filter from your fish tank is powerful, you can put the outlet hose into the fish tank, and the sand is circulated in the tank without draining water. If not, it is recommended that you remove turbid water directly from the tank and Change with clean water. Package Included 1 *Air-pressing control body 1 *Outlet hose 1 *Hose