Bubblemac is a corporate member of the World Aquaculture Society We Offer a large assortment of High Quality Aeration Products. These are "FOREVER STONES" they do not dissolve and go away..... Our Air Stones have been on the market for over 40 years and have been used by commercial fish farmers around the world. With the new interest in Aquaponics our products are now being utilized globally in this application as well. We also offer a large selection of Ozone/Oxygen diffusers, and Bio-Weave Air Diffuser Hoses. Feel free to contact us if you need help choosing the correct diffuser, whether it is a product we currently have or a special design for your application. sales@bubblemac.com 352-396-8043