Aqua One Airstone Carded Cylinder 1" | 2" 

Airstones are useful in aquariums because they replace oxygen in the water. By breaking the surface tension of the water, oxygen may be absorbed into the water and consumed by your fish and the filtering process.

One of the cornerstones to a healthy aquarium is well-oxygenated water, and this cylinder shaped airstone will create an appealing and effective bubble flow in your tank.