Hey buddy, how's it going?
In my opinion, even if you're watering them all the same and with the same nutrient dose, it might not be the most correct approach. Each plant has its own life, just like people.. Just saying, man :)
But I also see from the photos of your grow that the plants experienced heat stress or lack of humidity.
But no worries, the good news is you don't have to worry about that now :) You're really at the end of the grow..
It's normal for the leaves to show deficiencies in the final phase.
I recommend just watering with water in the final phase..
By the way, congrats on the grow!