Dry stall; is a pumice based substrate that farm feed stores carry. It comes in a 40 pound bag and costs around $10 sans tax in GA...(do not know about "other" states though). The company is http://www.drystall.com/index.html they do have a "dealer" link for inquiries regarding one's particular state... Hopefully this can be of help... J.W. in arid North GA, where the Crinums are blooming and everything else is suffering --------------------------------- Yahoo! Music Unlimited - Access over 1 million songs.Try it free.