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4 outlet air pump with air stone :each outlets supply 5000ml air flow per minutes, can be used the aquarium size up to 300 gallons; Low noise and quiet operation air pump: the noise level lower than 40 dB; Comes with 4 check valves ,prevent the water backflush the air pump; make sure the check valve direction is correct when install the check valve; Used as fish tank air pump,can be used for the aquarium size up to 300 gallons; Used as hydroponic air pump Used as small pond air pump or used in restaurant seefood pool or market fish store;





