Bentonite!!
· I got 50 pound bags at a farm supply near me for a think it was called sodium bentonite and is used to mix in with feed to bulk it up or something. I purchased 10 bags and that was enough to seal my small holding pond that is 25 by 30 feet. It was granular and sank immediately. If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees. Re ...