Think I need to add more cal-mag might be turning ...

damm i see multiple issue here first not enough nitrogen then too much call mag then add molasses(for sugar) you need calcium too ph might be off but not by much try ph 6 or 6.5 and dont forget 2 week flush before it end helps also i see your light says 15 inch from lplant bring that to 11.8 inch for more lumen

Hi @Fitzwell! Magnesium, manganese, potassium...at this stage, there are so many symptoms that it's hard to tell. These make me think of a nutrient lockout, the root mass could suffer from old nutrients/salts left in the medium. Do you measure the EC/ppm of your solution? Do you feed everytime you water, or do you give plain pH'd water sometimes? I would recommend to consider a 2 weeks flush before the chop. Happy growing! 👊

Looks like it, hard to tell for sure, but a calcium deficiency makes plants more susceptible to heat stress because calcium contributes in protein creation, which make plants more resistant to high temperatures. When adding more calcium be careful because too much will lockout potassium, magnesium, manganese and iron. 👊

Are you seeing brown spotting? If you are then yes that means she needs more calcium. Magnesium is on older lower growth where yellowing between veins. I'm seeing yellowing bon top which is telling me your grow light is to close. I would back off a little to 16 17 inches and monitor if you need to back up further.