Mark, I have had lousy luck with Bentonite but there has to be a right way to do it. Tossing it in the water and hoping for the best has never worked for me. Cecil Baird just finished doing that but used granular instead of the flour kind. He has just finished using it and I would exdpect it to be a little early to know the results. At a recent seminar, Bentonite was discussed. They said that what you are asking about is called Sprinkling and is the least desirable way to use it. I thing I would drain it, use more than is recommended and till it in. However, you might have to wait until it has dried up. When that stuff gets wet, it is slicker than snot. Interestingly enough, they said that the best Bentonite comes from Oklahoma.