SunSun HJ-311B Submersible Filtration Pump

The SunSun HJ-311B is a compact and energy-efficient internal filtration pump designed for small aquariums. Combining filtration, water circulation, and aeration in one unit, it helps maintain crystal-clear and oxygen-rich water for a healthy aquatic environment. Key Features 3-in-1 function: filtration, circulation, and aeration Flow rate: up to 300 L/h Low power consumption: 2W Dual filtration system (sponge + activated carbon) Built-in air injector for oxygen supply Adjustable water flow control Compact and space-saving design Suitable for aquariums up to 40–50L Quiet and energy-efficient operation