I'm using general hydroponics trio , growing out of bio bizz all mix soil pH is 5.8-6.5 usually 6.2 . Haven't been tracking ppm just following base nutrients grow chart but at half the strength . And haven't been experiencing any issues up until now 3rd week of flower when more calcium is needed
Dump the calmag, we dont need it in soil unless running RO. If running RO, also stop, unless tap water is unusable. Your PH is ok, I like to add a little hydrated lime to my soil as additional buffer. Also add Azomite at start of flower.
When reusing soil I add the same ingredients into soil and more new soil/perlite if volume is low
Looks like you're in early flower now, she needs food based on pics and your description of half strength feeds.
Give her one full strength feed around 3ec, ensure you have plenty of runoff. Drench the soil. You'll notice improvement in 24hrs
Happy growing