We've been plagued by high pHs for decades.
Source water is 8.3. Once you add a little fert to get a bloom going, it can spike up above 10!
Hardness is usually 120-140 range.
We add pelleted gypsum at up to 1 ton/acre.
It will bring the pH down, but takes some time to work.
And over time, it is now starting to seem like it takes more and more gypsum to have any effect.
