OK i did a water only flush a few days ago and the plants did get better however the first second my PH goes above 6 the yellowing starts. I cant believe how little nutrients the plants use. If I start my PPM at 400 they are at 430 the next day! That still means i am over feeding correct? They must be so stressed they dont wanna eat. As far as the weird growth on the buds are you sure thats from the plants trying to reveg?
This is why your yellowing starts.
Iron becomes, so much more available below 6ph.
Calmag above ph6
Even though you're supplementing iron, in your calmag, there's way more calmag than iron. Calcium and magnesium, may well be locking out iron.
I don't think it's a case of underfeeding either. But overfeeding. I'm gonna say that's why it improves a little, with straight water.
IMHO. It's not the ppms that are the problem, as much as its your balance.
Iron is one of the hardest things to be deficient in. It's used, and absorbed so slowly.
With all the balanced fertilizer out there today, iron deficiency is a thing of the past.
It could be a lockout of sulphur too. Does the yellowing form between the vains?
Or all over, doesn't care?
Looks like you have a lockout to me.