The Fluval Q1 air pump is powerful yet extremely quiet, producing a steady airflow thanks to its advanced swing-arm and diaphragm design. A thick double-walled outer casing, an integrated pump chamber, and a noise-dampening baffle make Fluval one of the quietest air pumps ever made. The Q1 is built to high standards and provides durable and reliable performance for aquariums up to 300 liters (80 US gallons).