I was told by gardener that you just have to boil carbon to reactivate it...same way they do water purifiers..I know this is a old thread..but might help in future
deleafer2220 Reviewed by deleafer2220 on . Is it possible to clean used activated carbon I was wondering if it was possible to "wash" old or used activated carbon in a solution to clean it, so that it can be reused again? Thanks :) Rating: 5