I think Rainman is essentially correct. pH of consistently low 10 in MO pounds is very rare. I question the accuracy of the pH testing method. How were the samples tested for pH?

If you want to know all about pH and how it is influenced by alkalinity, iron pyrite, alkali water in arid regions, humic - tannin drainage, phytoplankton, sunlight, turbidity and seasons then read the excellent article in PBoss magazine pg 42 Sep-Oct 2022 by Dr. Boyd. In certain conditions pH of pond water can change if not tested promptly at collection. If pH is tested by a laboratory the sample should be kept in the dark, and tested asap after collection to avoid pH changes. pH of water in a jar can change over time.

Last edited by Bill Cody; 02/16/23 09:35 PM.

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