SENZEAL L Size Sponge Filter Air Pump Foam Biochemical Filter for Aquarium with Check Valve Black

Aquarium sponge: made from eco-friendly sponge that is harmless to all your fish. Tube: made of non-toxic plastic, durable. Biochemical cotton filter can clean debris, stabilize water quality, can cultivate useful bacteria beneficial to aquatic pets. Biochemical cotton filter is the main source of air pump, the use of air compression system to provide power, can filter the fish tank of harmful floats, the harmful substances adsorbed on the sponge, the water back to the tank. Hazardous substances are decomposed by the sponge nitrifying bacteria and transformed into substances that are harmless to fish and returned to the aquarium, suitable for all kinds of fish to be kept and watched. Note:cannot use tap water or hot water,section to use aquarium water to clean.