I would approach it using a combination of bentonite and soil floc. Spread the bentonite out and then follow behind it with the Soil Floc. Adding plenty of both. Or drain the pond locate some clay, spread it across the ponds bottom and sides, pack it in and refill. It wont be cheap either way but if you don't take care of it now it will be a problem for the life of the pond.

Do not judge me by the politicians in my City, State or Federal Government.


Tracy