Super Silent Air Pumps from Hailea are an effective and quiet option for great aeration in your hydroponics reservoir. These are adjustable air flow by means of a knob mounted on the top of the pump. They are mounted on 4 rubber feet to reduce vibration further.

1 outlet (ACO9601), output 3.2L/minute, noise less than 40dB, 2W

2 outlet (ACO9602), output 7.2L/minute, noise less than 40dB, 5W