Dave, i appreciate the input. i had already bought the flour kind so it was sprinkled in the pond all over with a canoe this weekend- what a mess. i figured i could till it in later with more fresh if this doesnt work. i would definitely recommend granular for anyone putting it in the water. my pump is still running so i will let you know if i see any difference. let me hear what cecil baird experiences. i would like to try ess-13 next before draining it to till bentonite. however the guy i called, shawn at seepage control said they dont just sell you a barrel to dump on your own. they only do it with their techs over the entire area of the pond. i have a 3/4 acre, 4 foot puddle in a 14 acre hole. i would like to just dump a few barrels and see what happens. i have good clay and most of my hole wont seep. i just need to seal this bottom middle sandy part.