Penn-Plax Aqua-Mist Air Stone Cylinder Green 12ea/0.44 in, 2 pk

AS6 - The Penn-Plax Aqua-Mist 7/16" cylinder air stone is a great way to aerate your aquarium. An airstone is a necessary accessory in most freshwater and saltwater aquariums as they aid in water movement and gas exchange. Simply hook the airstone up to any aquarium air pump and its high pore design will create a cascading stream of bubbles inside your aquarium.