Hey Frm11001,
600ppm is stil on the low side to me when having already a bigger plant like that,
When i saw your diary you had like 350ppm before, she sufferd a little bit from that,
as you said your raised your ppm and it got a little bit better but now back to deficiencies again.
You should aim for 800 ppm now, its not just the call-mag problem again but she needs the whole package :)
Raise your base nutrients and vegs, might give her a drip of cal-mag as well but don't use to much since in my opinion calmag is more usefull in flowering stage.
Keep us informed :)
Good luck :)