Penn-Plax presents the impressively quiet line of Air-Pod Aquarium Air Pumps. The APP1 model quietly aerates and oxygenates fish tanks up to 10 gallons in size. It also comes standard with a single outlet that provides a constant flow rate of 1000 cc/min. This is the only flow rate setting for this model. In addition to taking up little space in the house it?s safe for both freshwater and saltwater fish tanks. Shop Penn-Plax for All Your Pet?s Needs: Penn-Plax is a manufacturer and distributor of top quality pet supplies who specialize in creating excellent pet products for animals both great and small.