It's taken me a few days to get the problem identified but it comes down to my (hanna) meter being screwed up and giving me the incorrect ph on all my plants.......despite the fact that it calibrates dead on for both 7.01 and 4.01. I love that. :wtf:
It's been reading way low....I believe because of colder temps in the w/f buckets. I was finally able to figure it out by pulling out my OLD hanna and calibrating and working with that. (the "old" hanna is actually the better one but more of a hassle to use.)

The one taller Sour Northern Lights x Neville's Haze got hit the hardest. I actually was thinking nuteburn and the only reason I'm sure it isn't is because the leaves themselves are uncurling (from the bottom of the plant up) and raising back up slowly now that the ph has been corrected. If it WERE nuteburn....the leaves would dry up and die....as it is they are slow returning to normal.
I'll post another pic once they are done. They may not heal 100% but it will be pretty close even if they don't come back all the way.

The second SNL x NH....the shorter plant seems completely unaffected by the ph swings and problems. Same batch of seeds and exact same environment....who knows WHAT the hell they are thinking? :wtf:

I have a new ph meter on the way that i'm excited about...supposed to be the bees knees of ph meters. It will be WONDERFUL to be able to trust what the damn meter is telling me. :thumbsup: