Bigfrog, have you taken any more steps to clear the water?
Both of my one acre ponds are pretty turbid. Since this is a new, never before, condition I have no reason to believe that anything chemical has occurred. Water level has dropped considerably as has the size. Wind on one and catfish in another may be the culprits. Since they are now between 1/2 and 2/3 acre, I'm thinking of starting with about 150 lbs of gyp on each to see what happens.