Boyu SP-1000A Submersible 3 in 1 Aquarium Internal Filter has an ABS plastic-coated body, making it durable and able to bear shocks. The non-corroding or anti-rust feature enhances the quality of the device. It caters to multiple functions like pumping and filtering the water, along with spraying oxygen as it comprises of the diving pump and biochemical filter. The use of stainless steel makes it suitable for both freshwater as well as marine water aquariums. The motor is sealed in the body with resin. With good waterproof performance and high isolation intensity, it is safe and reliable. It has a multifunctional design that solves various purposes like pumping, adding oxygen, and filtering 3 in 1. With a portable assembly structure, the filer can be easily set with 1-3 filter cylinders. Adopting special biochemical filter cotton, it is most suitable for cultivating fine nitro bacterial and cleaning the water.