What does an air stone do?
An air stone helps to provide oxygenate the nutrient solution. This oxygen is extremely beneficial to the root zone and helps to promote fast, healthy growth as well as prevent disease. This is one of the main reasons that plants growing in a hydroponic system grow so much faster than plants in soil. If you are growing in soil you can still reap some of the rewards of oxygen by simply oxygenating your water before applying it to the soil.
