Function: Manually controlled system, sand washing, cleaning, precise adjustment of the small suction head's tilt angle, can effectively pick up fish waste and feed debris in the sand, while cleaning sand and purifying water quality. Features: The flexible siphon pump prevents gravel and dirt from entering the tube and has the dual function of washing sand and changing water. Operating the bulb or manual start is its unique component. Material: The suction nozzle and suction tube are made of high-quality, durable plastic. Soft and transparent PVC hose can transfer liquid faster. The cleaner is equipped with a nozzle net, a pump bulb, and a drain pipe, and a small container self-priming water transfer design, which can speed up the working speed. Application: The short nozzle feature of the sand and matrix cleaner is ideal. Press or squeeze the pump bulb 5-7 times and water will start flowing out of the nozzle. Application: Use a clean pump to clean and keep the aquarium clean. Manual operation, easy to use and efficient.