Help diagnose my ladies!

Moved thread to Marijuana Plant Problems.
https://www.rollitup.org/t/help-diagnose-my-ladies.890878/#post-12092718

Hard to tell since your lights are on, I'm only going off of the pic file name ending in 008. I honestly don't know what it is but I just had this same problem during flower of my last Blue Mystic grow. Problem being those brown spots. I posted on here and never found anyone else who had this identical problem, the only thing I could find a pic of showing similar spots was a Cal/Mag deficiency. I bought Cal/Mag supplement which I was not currently using and it seemed to have stalled any further spreading. I run dwc btw. Of what I remember reading deficiencies can cause a chain reaction of other deficiency so you could end up with multiple symptoms pointing to different deficiencies.

Do you use Cal/Mag? I guess that would help narrow it down. PH being kept at optimal levels?