13 in 1 functions design: filter+water circulation+oxygen aeration. Built in filter cotton: effectively remove harmful substances in water. 2Equipped with oil film remover: multiple water filter, the effect is more significant. 3Waterfall type water outlet: can be used with water pump, low noise, energy saving and comfortable to use. 43 types to choose: each one suitable for different fish tank height, you can select according to your fish tank size. 5Made of premium plastic material, sturdy and durable to use.
