Before hand i watered the soil upto the point where it released a couple of water droplets when i squeezed it, so that the soil doesn't sink back to the middle of the pot, so it's 3/4th filled.
I dug a hole in the middle of the pot, filled it with cutting soil, aswel as a layer of 3cm ontop of the current substrate.
The substrate itself has been enriched with organic fertilizer made out of cow manure by DCM, and kieserite (26% MgO) both half the prescribed amount.
@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 :)