Aquatop Breza Aquarium Air Pump is a powerful yet quiet aquarium air pump that offers super low energy consumption. The AP-40 handles tanks from 10 to 50 gallons. The AP-100 is the largest in the series and is capable of aerating aquariums ranging from 40 to 100 gallons, and the AP-100 includes a control knob for an adjustable flow rate. Aquatop Breza aquarium air pumps give your aquatic creatures the oxygen they need in order to thrive. An air pump system adds air bubbles, creates a current, and agitates the water to help in filtration. An air pump also aids in maintaining stable and healthy pH levels inside the aquarium.