Thanks for the reply halfway. I don't have a hydroponics store in town, so I am always looking for growing mediums that I don't need to have shipped in. It usually cost just about as much to ship that stuff as it does for the product. Some places give free shipping but you usually need to spend $200 or more. Anyhow I will be on the lookout for the Sunleaves silica stone, and see if any of the local nursery carry it or at least can get it without charging me shipping.