[John S]

Ron: My 45-bottle system with lava rocks and miracle gro has been a success; I've added shots of saltpeter to get nitrate, and it's worked out; we've been selling basil and other herbs from it. Am working on a bleach bottle system for the roof and wondered whether wood pellets, as for stoves, would work as a medium. They're really cheap, and would seem to me better than sawdust for aeration.Any advice? John S.