Description: 3 in 1: water change, sand washing, algae scraping, three in one Advantage 1: Two 40CM transparent tubes, allowing you to easily clean the bottom sediments of the fish tank, Advantage 2: The drainage card position easily frees your hands, Advantage 3: Flow adjustment switch, stop when you want to stop, Advantage 4: Made of good quality material, durable, not easy to damage Specifications: Usage: Step 1. Connect the inlet and outlet pipe. Step 2. Put in a suitable location. Step 3. Press the air-pressing button with fingers lightly. Step 4. Absord the residue.   Package List: 1*Two-secontion water inlet pipe 40CM+40CM 1*3D filter 1*Outlet pipe 207CM (caliber 1CM) 1*Inlet pipe connector 1*Water flow adjusting clip 1*Main body of water changer 1*Water pipe fixing clip 1*glass scraper