Does anybody tried them for potting media before?
I have a ready source of the stuff, and I was thinking, how about using them as an alternative for bark or CHC? They have a thin layer of husks still attached, and the inner side need to be scrape clean, that means soaking for few days. Is there anything else in the shell that I should consider about? harmful chemicals,etc? I used the shell as pots before, and it worked great.

Any opinions ? Thanks in advance.