Deficiency issue

You don't mention the pH level you're maintaining... and that's a crucial part of getting calcium to your plant. If it's out of whack, no matter how much calmag you add, the plant won't be able to absorb it. If you don't have a pH pen, consider investing in one now - it's the single most important tool you can own for any grow! The pH should sit between 6.0 and 6.5 - 6.3 being optimal - but NO lower than 6.0 in soil as calcium won't be absorbed. If you find your pH to be way off the mark, you may need to do a flush ... I wouldn't bother cutting your nutes in half as is usual after a flush since you're not giving any nitrogen (but you might consider adding in about 1/4 strength of your grow nutes just to give the plant a small dose of nitrogen which is does need in flower). You could also add the PK13-14 which would help. Good luck!

They look hungry i would keep adding the calmag also up the N 5% up the P 15% up the K 10%.