Penn Plax Silent Air Aquarium Air Pumps are the simple solution to powering airstones, aquarium ornaments, protein skimmers or other air-powered devices in your aquarium. Simplicity and quiet operation combine with high performance and reliability for a variety of aquarium aeration functions.
The Silent Air X-4 has two outlets and is rated for aquariums up to 55 gallons.
Using an air pump adds dissolved oxygen to your water, improving the overall health of your aquarium. For more information on aquarium aeration, please see our article on Air Pumps.