I agree with you burger about the 25# of Hy Lime making little overall PH change. I also agree the PH should be raised. Five tons of dolomite Ag Lime would be great here!
I once added the lime first in a slightly acidic pond, once. To date it is the only pond I have treated to have some floaters in it afterward (about 50). I suspect, but don't know, that the fish that died where close to the lime or even directly hit when it was applied and they were shocked...it is the only explanation that made sense to me.
