???? How to use the mini aquarium air pump for small fish tank. 1. Connect the air stone to the air tube. Make sure it fits well to prevent air leakage from the tube instead from the stone. 2. Connect the air tube to the mini aquarium air pump outlet,please make sure it fits well. 3. Stick the sucking disc on the back of the pump. 4. please install the check valve to the air tube to prevent any possible water backflow.or put the small aquarium air pump higher than the water surface. 5. Place the air stone in the aquarium tank, immersed in water. If the air tube is too long for your fish tank, cut a section as needed. 6. Connect the power adapter to the electrical outlet to start operation. ???? Specifications: Power:1W Max Flow Rate: 400ML/Min Voltage: 110V Frequency:60Hz Noise: <35db Pressure:10MPa Air tube:3.44 ft ???? Warm Tips: Take the small fish air pump away from the water. Please cut off the power immediately if the quiet fish air pump fall into the fish tank accidentally. To get the max air flow and extend the working life of the air pump for fish tank,please remember to clean the air pipe and the air stone regularly. Please stop to use the mini fish tank oxygen pump if there is any damage of the product. Please cut off the power of the fish tank air pump before put in your hand to fish tank. The place you put 10 gallon pump must higher than the water surface. If lower than water surface,please install the check valve between the tube to avoid the water flow back to mini aquarium oxygen pump through tube. Package included: 1 x Quiet aquarium air pump 1 x Air tube 1 x Air Stone 1 x Check valve 1 x Power adapter 4 x Suction cups for air tube 1 x User manual