bkhovest. i have been hanging around at this site for over a year and have made and seen many requests for information on ess-13 or anyone who would recommend it. i called the company and asked for info. i have more money than sense and they could easily take me for thousands. noone responds and i think it is a bs ghost. you will not see any of the pros on this site come in and tell you anything about any experience with it. i am challenging anyone from ess-13 to even claim anything here. call me at 405-232-4100. show me anything. i have a 14 acre hole that i dryed and put 18 tons of bentonite in last week(all a diesel could haul) because i couldn't get any good input at all on this product. i have good clay available and my lake will fill at any cost but ess-13 has gone to the bottom of my list. rainfall is my number one problem with record lows last year. good professional inspection and advice has gone to the top of my list. noone will even claim that ess-13 belongs there.