@davisgirl ..sorry i missed this luv, holler louder next time!
....yeah, really bad Ca defc. screws with things physically to, membranes cell walls, lots of other things too... Check out the pics in the Defc. Pic Depot under Ca defc., you'll see lots of that less common spotting that hugs the midrib and lateral veins... weird! That she resisted correction could be a few things, including just being one of those odd pheno's that seems to never get enough,.. I think this could be defect in the plants metabolism or uptake of it..? Sure some need more than others, up to a point! But when you're practically bathing the girl in Ca-Mg solution, it makes you wonder,.. Also in play is the cumulative effect of all that input, and uptake interference of Ca from other cations like Mg,... levels of these two must have to be very high to get toxicity effects (not sure I've ever seen it
per se, usually part of a bigger nutrient snafu!), but such interference at the root levels need not be as high I believe,.... Ironic silly vicious circle to get into!

... no telling at this point unless you ripped into the root zone, dug out enough sample soil from there to do a slurry test of both pH and ppm.....

How about the other girls in there, signs on them, and are they different strains? That's part of the tell here, if they have minor troubles and the one is a mess, then some combo of all the above could be in play,....