Oxygenize: By increasing surface agitation, air stones promote gas exchange to accelerate oxygen replenishment within your grow system. Refresh: Through replenishing oxygen replacement, air stones reduce the overall amount of carbon dioxide buildup. Energize: Air stones release thousands of bubbles into the water to aerate flow and move toxins to the surface to dissipate. Life Span: Through relaxing and circulating the water, aqua stones will extend the life of the nutrients in your water farm system. Relief: Aqua stones work to alleviate any back pressure weighing down your pump.