Separate pots, they are plastic? I do not see any air holes to be a airpot, or fabric not that it's required but it does make the medium far more susceptible to bacterial growth as even the slightest over-watering can lead to issues within the rootzones when moisture sits and stagnates for given time.
The air below canopy is also important to ensure no moisture sits too long.
I don't really see a deficiency, but the plant on the bottom right, leaves looks laden with water and healthy to the point it's "too much" possibly.
whatever is affecting it is all over the plant's top and bottom, this tells leads me to think it is not a nutrient based problem, more a problem with the plumbing underground.
Good luck i hope she provides bountiful harvesst in the end brother/sister!