Perhaps short on Ca and / or maybe a little heavy on the mites.....definitely give your girls a once or twice over.
More importantly, remember, just because the plant is showing a deficiency of something you're feeding, doesn't always indicate the plant needs or wants more of what you're feeding. Sometimes everything the plant needs is there, it's just not available. Be careful with the CalMag, especially if you feel you only need one (Ca) or the other (Mg). While they do go hand in hand, they are not wholly correlated and sometimes too much of one will cause you issues with the other...ask me how I know. If the 'coco specialized' nutrients you're feeding already has Ca and Mg in it, and perhaps your base water does too, you may be over doing it by the addition of the extra CalMag....but don't forget to check for pests.
Just some food for thought...good luck.