After reading the M.S.D.S on their pretty spendy product i realized its basicly P.E.T. poly fill .Am I wrong? I'm going to Wal Mart today and buy several bags of the Pillow filling made from recycled plastic bottles and see if this will work in an ebb and flow bucket system. I'm going to probably stuff my upper buckets with it then top it with Grow stones or some hydroton