No calmag. I had made some queries on a reddit board because all of my readings (ph, ppm, temps, humidity) seemed fine but they had started doing this very slowly, bottom up. The most common answer was because I was winding down the nitrogen as the moved further into bloom. One guy even said he had found most fertilizers cut back too much on the nitrogen in the bloom cycle and to strengthen the nitrogen. As it was near the end I decided to just move to flushing, so they have lacked full strength fertilizer for about a week.
I'm planning on cutting them this weekend coming up.