I would hit that pond with a huge shock of hydrated lime. It will tie up the nutrient load after the organics break down on the bottom of the pond. Calcium nitrate, calcium phosphate, ect. into bonds that are much harder to break. Plant roots would need to break the bonds.

The water will clear and be good to drink from.

Adding salts could be adding the the PH swing that is most likely adding to the available soluble nutrients. You want to tie them up with a strong covalent bond.

Cheers Don.


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7/8th of an acre, Perch only pond, Ontario, Canada.