Posted: 02/08/2016 at 15:44
In reply to Rodgebodge, I put pieces of charcoal in my water butt and it seems to work.
I kadge some pieces off my friend after she has had a bonfire, about the size of a small fist then cut some shade netting into squares and put the charcoal in the middle of a piece then tie the end with anything that won't rot,so the charcoal doesn't fall out.
Drop it into your butt, I also sometimes put a small stone in with the charcoal to weight it to the bottom.
This should last about twelve months , I redo mine when I am cleaning the butts out then i know it's not forgotten .
I remember my father using this method many years ago, sometimes the old methods are the best.