This product consists of submersible pump and sprinking bar biochemical filter. The pump body is made from die-cast ABS engineering plastic and can endure shock and rust. The motor is sealed in the body shell with resin. with excellent waterproof performance and high isolation intensity, it is safe and reliable. Multi-functional design, various purposes in a machine pumping, adding oxygen and filtering 3 in 1. With protable assembly structure, Adopting special biochemical filter cotton, it is most suitable for cultivating fine nitrobacteria and cleaning the water.