It is used to displace clean or dirty pond water with the temperature from 4 to 35. ; As an amphibious pump with the rustless ceramic shaft, ;it is widely used in the aquarium tank, waterfalls,garden foundations, pond filtration systems, and other application. Also, with ;ultra-quiet design, it won't disturb your lovely fish and your normal life. ; Features: ECO saving and generates more power with less energy consumption. ; Great for both fresh and salt water applications and can be used in either wet or dry applications. Ultra-quiet design keeps a quiet environment for fish EZ access cover allows ease of maintenance of rotor, shaft and removable impellers. This pump will automatically cut up the power when there is no water or the rotor was blocked. Flow rate is adjustable, you can adjust the flow rate easily with the adjuster Woking voice between 40-50db,quiet for aquarium life Safe for fish(no copper, no oil) Ceramic shaft,corrosion resistant in salt water Allow large size of the dirt particles down to 4.1 "with spiral propeller design Handheld design,easy to carry-- ;can be taken apart without using any tools,easy ;to clean.