AquaNatural Diamond Black 10lb, Premium Gravel and Substrate for Aquariums, Fish Tanks and terrariums, 2-4mm

🐡FUNCTION 1 SAND WASHING: 9.85ft super high head, and the water changer pump can provide a strong flow of up to 396GPH, the power of sand washer is sufficient to quickly change the water, saving half the time compared to manual. In addition, the accessorie has been upgraded with a filter sponge inside, which can block the sand from entering the motor pump and cause blockage. 🐡CLEANING 2 FUNCTION: Our sand algae cleaner have four spliced rigid tubes, which can be extended to 11.4 inch to 40.5 inch according to 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. 🐡FUNCTION 3 FILTRATION and WATER CHANGE: Use filter housing, you can directly drain clean water back into the tank. The filter material can be washed and used multiple times, and other filter materials can be replaced. Use water pipe, the water is directly flows out of the tank. It is suitable for very dirty fish tanks. It can also change and add water. The starting water level can be as low as 2in and the pumping as low as 0.3in.