Originally Posted by Ozarkprepper
Not sure if it matters, but I am in northwest Arkansas, probably the same type of lime stone and cedar growing. Could it be from a lack of organic material? The Pond is pretty bare, it just had its first natural bloom, I haven’t fertilized.
I was under the impression that the more organic matter that built up in the pond would help lower the pH as it decays


IIRC, Calcite Limestone has a max pH of 8.4 and Dolomite Limestone has a max pH of 8.2....it is not limestone that could cause a pH over 10. I'd first get a lab test done. I keep 5 new pH pens because they fail so quickly