results on lining my pond bottom with 2 ft of good clay is that the pond holds well now (after dropping 6ft or so) and pond evaporation is finally the same as in insulated comparison bucket for test. i am now down to a level where the water is held by the new bottom thus the similar evaporation. in the next month or so i will proceed to put a 2 to 3' wide core in my dam face that will extend app. 3' below the bottom of the pond-- i will use similar good clay and mix in some db200. then will rake in some db200 + kitty litter mix between the water level in pond and the new core (app. 2 to 3') simply as a precaution or added benefit. good luck to all --will continue to post any results or problems as they develop. as i haven't seen any definite results from DB products posted i will do this basic pond repair with some assist from the db products.
