Hello mate :)
You used CAL-MAG, it blocked the flow of nutrients and you are giving nutrients with too low pH, both things cause a slight burns on leafs in my opinion. You can make a small flush of plain water, but with adjusted pH to 6.5 or for a few 2/3 days give regulated water. From my observations, it seems to me that the girls feels best with a pH between 6.5 and 6.7 pH.
Good luck 💪 it looks nice 💪