Powerful yet extremely quiet, the Fluval Q1 Air Pump produces consistent air flow thanks to an advanced swing-arm and diaphragm design.
A thick double-wall outer casing, integrated pump well and noise-suppressing baffle chamber make Fluval one of the quietest air pumps to date. The Q1 is quality constructed and will provide lasting and reliable performance for aquariums up to 300 L (80 U.S. gal).
Key Features :

Powerful yet extremely quiet aquarium air pump
Produces consistent air flow thanks to advanced swing-arm and diaphragm design
Ultra quiet air pump, thanks to thick double-wall outer casing, integrated pump well and noise-suppressing baffle chamber
Quality design provides lasting and reliable performance
For aquariums up to 300L (80 US gal)

Other model available :

A852 Fluval Q2 Air Pump,