【Upgraded design】:The upgraded new product is that the handle is specially designed to be easy to press, and the comfortable grip makes it easy to press. The working principle of the water changer is atmospheric pressure. No need for electricity and safety. The aquarium gravel cleaner is quiet and does not make noise when it works. 【Easy to Use】: The fish tank water changer is easy to operate and is a new upgraded product. When in use, hold the handle and manually press it down. The water will automatically be sucked into the hard tube and flow out through the hose to quickly clean the fish tank. It can be used easily without wasting time. 【Multifunctional Product】: gravel cleaner can be used to wash sand, absorb dirt, dust, suck fish feces, change water, etc., to meet your multiple needs, one product can be used for multiple purposes!