hiraliy aquarium air pump, fish tank air pump with dual outlet adjustable air valve, ultra silent oxygen fish tank bubbler with air stones silicone tube check valves up to 100 gallon tank hiraliy <b>full of oxygen and keep fish happy and thrive in the aquarium tank, with the help of hiraliy well-constructed fish tank air pump</b> <br> <br> <b>easy to install</b> <br>all accessories can be assembled with a few minutes, please set the pump above the aquarium or fish tank. you can also add a check valve between the air pump and the air stone to stop back siphoning; <br> <br> <b>double outlets air pump</b> <br>equipped with dual outlets' fish tank pump (3 watt power), 2 pieces 6.6 ft silicone tubing provided for easy to insert multiple fish tanks or aquariums through the double outlets; <br> <br> <b>adjustable flow rate</b> <br>you just need to turn the air pump knob to adjust the flow rate as your tank size. the maximum volume of tank is about 80 gallons; <br> <br> <b>low noise & shockproof</b> <br>4 solid rubber feets on the bottom of fish tank pump ensures offer low noise and keep it in the place. for better noise reduction, it's recommended to put a towel or blanket under the fish air pump <br> <br> <b>package contents</b> <br>4 x air stones; <br> 2 x 6.6 ft (2m) silicone tubing; <br>2 x return valves; <br> 2 x suction cups; <br> 1 x hiraliy aquarium air pump; <br>1 x blue card; <br>1 x user manual;