Hi
@Da_Magus! Too much nutrients, a bad pH range, and probably a bad watering routine, led to this situation. Now your rootmass is certainly in a nutrient-lockout scenario, being unable to manage nutrients uptake anymore. First, get a pH-pen a make sure it's perfectly calibrated, you will need to buffer every waterings within the good pH range for soil, 6.2~6.5, whether it's a feeding solution or only pure water you need to buffer it, for a healthy rootmass. Next, about your waterings, make sure to water with 15~20% of your pot's volume, never exceed 20% or you might flood the roots. After each watering, let the medium dry a bit, not 100% dry for too long, but the pot should feel lightweight, roots need to be on a wet/dry cycle to properly spread, searching for water. Finally you can consider flushing, with heavy loads of water (at least twice of the container's volume) to get rid of old nutrients/salts and start on a fresh basis. But if you do so, try to help the medim to dry, by putting a small fan blowing a continuous breeze onto the container's surface, if you flush heavily and do not help the drying process you might encounter over-watering symptoms. Hope this will help, let us know how this goes, and happy growing! 👊