Air Plex Air Pump -
The Seapora Air Plex Air Pump is a simple and reliable air pump for beginner to expert aquarists. An excellent air pump for air stones, manifolds, and aerating ornaments. This is a low wattage, affordable, and energy efficient series of pumps, ready to meet all the requirements you might have of a basic air pump.
Model 20 Single Output for aquariums up to 20 gallons
Model 60 Double Output for aquariums up to 60 gallons.
Model 90 Double Output for aquariums up to 100 gallons