Originally Posted By: Audiophobe
Is that Bentonite?
Can I buy that at Agway?


I am assuming you are asking this in relation to clay?

Clay is just a type of dirt. Very good for pond sealing. I am under the impression that it can be found in most areas through out the states, but I don't know your region so I can't say its there for sure. Some times its just below the topsoil, and other times you might have to dig 30 feet down before you find it. You might buy it thru gravel pits.

Bentonite is a product you would mix with the dirt to help it seal better. Used when you don't have access to good dirt like clay. Still would not work very well, if at all, if you mixed bentonite with muck.