Matt,
The 15 to 1 ratio is interesting....when the Texas bentonite folks told me 8 inches of bentonite was required to seal a pond that already has clay in it, I assume they meant 8 inches of the material, not 1/2 inch of material which would expand to close to 8 inches. So, are you saying that 1/2 inch of material is all that is required?
That would indeed be amazing stuff, if in fact that is all that is required to effectively seal a leaking pond.
