ActiveAqua™ Commercial Air Pumps Perfect to run several Waterfarms or multiple air stones at once Electrical magnetic air compressor in a high quality aluminum alloy case, wear and tear resistant material for cylinder and piston High pressure and high output. Comes with multi-outlet divider (6, 8, and 12) that can be individually opened or shut [...]

The Million Air Pumps are very quiet. The single air outlet puts out a maximum of 50 gallons of air per hour. The dual air outlets puts out 100 gallons of air per hour. They both have an adjustable air output.