You can find crushed pumice in 40 pound bags at Feed and Tack stores. It is labeled as "Dry Stall" which contains a white porous rock of volcanic origin. Make sure you look at it before you buy, because the first time I bought "Stall Dry" which looks like something you would use on shop floors to clean up spills. JIM BARTON _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>