Got two ladies having some problems, all get the same food but only this two have show some problem.
Fedding with Advanced Nutrients pH perfect
PH 6.3-6.5
eC ~800
Hello mate, you have a Ca/Mg issue, this could be caused or by overfeeding with a crystalized chemical salts in the soil (flush is the solution) or by a pH fluctuation in the soil but you are using the pH perfect product so i think the first is more probable.
Good luck and happy journey!