aloha laten immage. sorry haven't gotten back to you. about that cinder rock for draniage, i think it would be okay but i am not an expert. i use blue rock from my orchids in the bottem, so i don't see a problem if you say that there is no "ph" problem. maybe someone else has a better answer for you. good luck, aloha aunty

__________________
You mean they can tell God that it's not legal?
- Bob Marley