Prob. got nute burns like stated earlier. Flush ,Flush ,Flush with water only. MG soil or fert is crap stay away from it like the plauge. Me personaly I use60-65% vermiculite to 40-45% perlite as a medium thats it. Old school hydro.
Clones...veg...flower.... loves the mix. When done right, after harvest the roots look and smell fresh like alfalfa sprouts. Enough of that I am getting hungry now. Best advice is the K.I.S.S system. Keep it simple stupid. You feed that plant like feeding a newborn on a Berry Bonds "juice" diet. Like everything, practice and trial and error will show you the light. Good luck and good grows.:hippy: