Being a fish keeper myself, I know exactly what fish need.

• Our aquarium air pump kit can quietly energize your aquarium through low power consumption. Filling the aquarium with oxygen keeps your fish happy and growing in an oxygen-rich environment and free to swim in the comfort of your bathtub again!
• Our Aquarium Air Pump Fish Tank Aerator 4W Adjustable Oxygen Pump Fish Tank Air Pump for 5-170 Gallon Tank
• Material: ABS shell, with good heat resistance, low temperature resistance, abrasion resistance
• Air output: 2X3L/min(4W)

Package include:

• 1 x aquarium air pump
• 2 x air stones
• 2 x 1.4m silicone tubing
• 2 x return valves

Assembly is very easy

Important Notice:

1. When the fish bubbler generator is positioned below the water level in the aquarium, it must be connected to a check valve as shown in the diagram to prevent backflow of aquarium water and damage to the air pump.

2. When the fish bubbler generator is positioned above the water level in the aquarium, a check valve is not required.

3. This adjustable aquarium air pump is not suitable for submersible use.

• According to your needs, you can cut each silicone tube into 2 sections, one longer and one shorter, connect the shorter end to the air outlet holes of the 2 oxygen pumps, and link the other end to the blue non-return valve (the end without arrow).

• Then connect the other end of the non-return valve (the one with arrow indication) to one end of the longer silicone tube, and then connect the other end of the silicone tube to the air disk stone, so that more oxygen can be obtained through the connecting tube, and to prevent the oxygen pumps from backing up when they are lower than the tank position, resulting in damage to the oxygen pumps or backflow of water from the tank to flood the floor.

Warm and Important Notes:

• You can quickly adjust the air pump knob to adjust the flow rate according to the tank size.

• Due to the different size of the fish tank, please adjust the oxygen stone according to your needs, our setup defaults to 4cm diameter air stone disk, if you need other, please buy it by yourself.

• In order to prolong the life of the aquarium air pump, we recommend you to clean the silicone tube and air stone regularly.

• 4 shock-absorbing soft rubber pads at the bottom, effectively reduce the working noise. Note: As the oxygen pump is mechanical movement, it is impossible to be 100% noiseless, if you still feel noise during re-use, it is recommended that you can pad a layer of sponge at the bottom of the oxygen pump, which will have a good relief effect!