Made of anti-aging ABS material, the pond pressure bio filter is durable. Equipped with an ultraviolet clarifier, it can effectively decompose harmful substances and improve water quality. Two kinds of biochemical sponges with different densities can effectively ensure the balance of water flow and the reproduction and survival of nitrifying bacteria. Moreover, the self-cleaning function can prevent the sponge space from being occupied by mud and the dirty water can be diverted into the sewage system or lawn for water recycling. The pond bio filter will offer you crystal clear pond water.