Welcome to our store [Innovative Design]: The handle is designed for easy pressing, the comfortable grip makes it easy to squeeze. The principle of operation of the water exchanger is gravity, does not require electricity and is absolutely safe. This sand cleaner is quiet when working, but the electric aquarium water exchanger makes noise when working. [Multifunctional]: Fortune Star filter to meet all your requirements of aquarium. Can be used for raking gravel (ground leveling). Cleaning of sand and gravel (removal of powder particles). Faecal absorption (elimination of fish excrement). Quick water change (stronger suction, easier water change). The aquarium remained clean and beautiful all the time. [easy to use] accessories: 1 Air Pressure Control Mechanism (with Fixed Valve), 2 Extended Intake Pipes, 1 Extension Pipe Connector; 1 water outlet pipe (the water pipe can be cut as needed); 1 water clamp (easy to adjust the water flow); Instructions: If you don't know how to use it, please check the instruction manual. [Scope]: Fortune Star Aquarium Gravel Cleaning Kit is suitable for all aquarium sizes. There are two lengthened inlet pipes and one 82" outlet pipe which can be adjusted to the appropriate length according to the size of the aquarium and the water changer does not affect the fish during the operation. use.