Christopher,
The reason I wanted you to post again after your bentonite treatment, was to give you the contact info for TJ. However, I see that he has now dropped into your thread.
He is the "leak expert" on Pond Boss and can give you more detailed guidance if you contact him directly.
P.S. I had the product name wrong in my previous post. The product that people have had the best success with is called SeekLeak. I know it sounds expensive, but if you "right size" the treatment, it should be significantly cheaper than my mechanical solution of re-doing part of the core trench.
