Air stones are an essential part of an aquaponic system. Failure to provide good aeration for fish and plants is one of the more common issues we see in both home and commercial systems.
Air stones are usually created by sandstone composite or bonded glass. When an air pump provides air to the air stone the air is then diffused into very fine bubbles. These small bubbles will then expose more surface area of the water to air which then increases the dissolve oxygen in the water.