...Ah, I saw now,... well, those meters are dubious for accuracy, just so you know,.. the Accurate 8 is the best one for the $$,... Your water is hard, at 7.2 pH? Did you take a TDS/EC reading? that's an unusual reading for truly hard water, which is about 250ppm+,... your pH meter, have you calibrated it before? these are pretty sensitive instruments, and go out of calibration easily, especially if not stored properly, clean, and in the right storage solution,..
Good on the nutes, just checking,... color could be genetic (don't know if Early Miss is known for it genetically), and/or the cool nights which can bring color out,.. mild P defc. causes it too, and in fact, temps in the 50's F can slow P uptake,....
For plants in bud, Potassium bicarbonate or milk solution would be best,... low residues!