Cecil, What you are asking about is called Sprinkling and is considered the worst way to utilize Bentonite. I have tried it and would have to agree. When I tried it, the darned stuff clumped up (expanded) as soon as it hit the water. Then the whole works slowly drifted to the side of the pond. If you could somehow put a large piece of pipe around the area you are trying to seal so the stuff would stay still and sink, you MIGHT have a better chance. I think I would about as soon pour Sakrete in.
However, let me qualify my entire response. I have tried Bentonite several times on small stock tanks that I have cleaned out and hit sand. It has never worked for me whether or not there was water in the hole. Maybe someone else knows how to do it correctly. Good luck.
