Mike I think if you keep adding ag lime you will get Alk and Ph up. Can't add too much really, so add 500-1000 and see what happens. I added 6.6 tons my 1.8 acres and it increased Ph from 7.2 to 8.5 and Alk went up a good bit too but can't remember how much.
1.8 acre pond with CNBG, RES, HSB, and LMB
Trophy Hunter feeder.
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