Hey guys had to water my plants with 8.0 ph well water for abit, just want a confirmation this is beginnings of nute lockout or ph flux

So I got a ph reader again, and am ph’ing the water abit lower than normal, to about 6 to help with all the alkalinity they suffered. I am also watering to 10% runoff.
Big ones under net are in FFOF x Roots x Happy frog.
Smaller ones that are having more issues are in peat and vermiculite substrate, they seemed to be most effected by the high ph water.
For nutrients my well water is 350ppm of something, I assume some calcium so I’ve been adding some epsom because I saw red stems. About .5g per gallon.

Lights are 2 agromax 550 3000k and 1 SF4000. I think they look better than before with the new ph’d water.