The return valve should be installed correctly, the larger end should be installed close to the air pump, and the smaller end should be installed close to the air stone.Tip: Before using the air return valve, pass a thin object( Such as the needle) through it to avoid internal stickiness, which will make the air flow more smooth.
Replaceable Filter Cotton
Filter cotton can filter the impurities in the air.Extra air cotton is provided for replacement, extending the service life of the air pump.
Additional suction cups have been provided.The suction cup can fix the air hose on the fish tank so that the air hose will not swing in the water during work, and it looks more beautiful.
About Return Valve
About Filter Cotton
About Suction Cup
[Powerful Pump] 4 outlets fish tank air pump, super large air volume for up to 300 gallon tank, the max pressure is 20Kpa, the max air volume is 256GPH(4*4L/min), can be easily connected to more air stones, can be used for larger fish tanks, aquariums, hydroponics and small ponds. [Adjustable Air Flow] Accurate electronic adjustment air volume, just adjust the knob on the aquarium air pump to get suitable air volume, will not cause vibration, more stable and safer. [Low Noise] The upper and lower shells are tightly sealed, and the thickened side shells wrap the gap, effectively reducing noise. The soft silicone foot design also effectively reduces vibration of the aquarium bubbler. [Longer Service Life] The air filter cotton of this silent oxygen pump can filter impurities in the air and make the air pump more stable. Extra air cotton is provided for replacement, extending the service life of the air pump. [Package Includes] Comes with all needed accessories, includes: Air hose x 4( 4.9 FT); Air stone x 4; Return valve x 4; Suction cup x 4; Regulating valve x 4; Air filtering cotton x 2, T connector x 2. Original quality, professional manufacturer.
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