Hygger Super Quiet Aquarium Air Pump

Description  Warm Tips 1. The pump is not submersible, please keep it dry and do not put it into the aquarium. 2. To get the maximum airflow and extend air pump service life, it is suggested to clean the air tube and air stone regularly. 3. For the 5 W air pump, it is recommended to connect 3 devices at most, and the water depth cannot exceed 5 feet. 4. For the 10 W air pump, it is recommended to connect 4 devices at most, and the water depth cannot exceed 6 feet.  Common Faults and Solutions 1. Excess noises and vibration. It is usually caused by an unlevel surface or faulty connection. Please make sure the air pump is level, and check all the connections. 2. The pump is on, but no air flow or air flow is diminished. The problem may occur if there is dust on the filter cotton, please clean it to fix this issue. If not resolved, please check if the air stone is placed too deep or not soaked in water before use. If it is placed too deep, please move it up. It is recommended to soak the air stone in water for half an hour before first use. 3. The pump is not turning on. This issue may occur if it is not connected to power or lack of the voltage. Please make sure the power is connected and the voltage is AC 110-120 V.