🐟CLEANING FUNCTION: Our sand cleaner have four spliced rigid tubes, which can be extended from 11.4 inches to 40.5 inches according to the tank. With brush heads, each corner of the fish tank can be cleaned. Aquarium gravel cleaner can also be used with the duckbill suction port to suck dirt from the corner of the fish tank, and the dung can be easily sucked away. 🐠WATER CHANGE FUNCTION: 4.92ft super high head, and the water changer pump can provide a strong flow of up to 360GPH, the power of sand washer is sufficient to quickly change the water, saving half the time compared to manual. The starting water level can be as low as 2in, no water accumulation, and pumping as low as 0.3in. 🐡FILTRATION FUNCTION: The filter housing can filter the garbage in the water and make the clean water return to the tank. The fish tank can be filtered without changing water, such as washing sand, and the dirt is directly passed through the filter box. Filter sponge can be repeatedly cleaned and reused and can be replaced with other filter media.