So far the necrotic spots have been reducing daily in expansion rate. It seems like the low pH was the cause of the P, Ca and K blockades, it bothers me greatly that i picked up on this so late, and that my girls are in this current shape.
The pH in the middle and lower regions of the pots are still around 5.5 to 5.7, the upper layers seem to have a rather high pH, i assume the more i water, the more of this pH will start going down in the pots and in turn raise the pH in the lower regions, as well as reducing it in the higher regions of the pots.
I'm planning on giving grow fertilizer for the last time in this coming week, while doing this i will measure the pH of the water, and add pH plus if this is necessary.
The roots of the girls don't seem to be having any problem with the 1.5ml of pH plus i gave previous week. they appear white and healthy in the top layer of the soil.
@BleuBayouOrganics, Yeah i was thinking it aswel combined with P and Ca, but what is actually happening is that my PH went down in my soil from 6.5 to 5-5.5 somehow. and this blocks Mg Ca and P from being absorbed, Which is the reason of the discolouring. I first thought it was a deficiency aswel, but as it turned out without me noticing, it was because of this that the nutrients are getting blocked from being absorbed, and it seems like there isn't enough in the ground, but i can assure you, there is plenty, a bit too much actually, next run i will start using feeding schedules and go full organic, with the exclusion of pk 13-14 in the last weeks. That way i wont have to bother with PH anymore :)