vivosun 800gph submersible pump(3000l/h, 24w), ultra quiet water pump with 10ft high lift, fountain pump with 6.5ft power cord, 3 nozzles for fish tank, pond, aquarium, statuary, hydroponics vivosun <b>pg pump instructions: high performance energy-efficient pumps designed for use in ponds, fountains, waterfalls, hydroponic systems, irrigation systems and water features.</b> <br>for use in either wet or dry installations and features wet rotor/wet bearing technology for cooler running. pre-filter screen handles large particles for less maintenance. multiple size insert fitting and suction cups included. designed for fresh water use only. <br><br><b>pump maintenance:</b> <br>this pump design features a water lubricated ceramic bearing and shaft for long lasting service. however, the rotor assembly is susceptible to failure if sand or extra fine grit is being pumped. <br><br>-caution: always disconnect the pump when performing any maintenance or handling. <br>-check the circuit breaker and try another(gfci) outlet to ensure the pump is getting electrical power. <br>-check the pump discharge, impeller and tubing for obstructions. <br>-check the inlet screen to ensure it is not clogged. <br>-after removing the volute, rotate the impeller by hand to insure that it can spin freely.