Your problem is nutrient overload. Your feeding tht little baby far too much. You are burning her leaves. Dump rez... refill with ALOT less of everything. Mabey even none of somethings like Bush doctor. extreme levels of grow which us too much nitrogen for the young roots plus your bio root that has more nitrogen. Dial it back and she will be straight! If the others are being fed like her. They will likely suffer soon as well. Flush them too