HFS. Why do you keep dodging the issue Ric? Perhaps because you are 100% wrong? You really need to stop trying to talk soil science to me. ..........but since you brought it up ....... Got some CEC numbers (referenced) on those glass beads? And while your at it, how about some numbers on the CEC of organic matter? (Note: provide CEC numbers in mmol/kg) How about a product link for these beads with costs? How about some viewable samples or studies showing its use in landscapes as a soil amendment? What I can't seem to understand is why you would want to increase hydraulic conductivity in your sandy soils? You are coming close to surpassing Rod in sheer ignorant arguments, not to mention the contradictions. Keep on digging though Ric, the entertainment value is priceless.