Is that floor over concrete? If so the concrete cold floor can suck the heat from your plants and lock out nutrients in the soil. This manifests as pale leaves from locked out N. Overwatering can exacerbate the issue.
I answered over in your grow thread. I think you have an over fert issue. a flush is needed and then lighter nutes for a bit. The fox farm soil already has a bunch of nutrient.
To put link in sig, copy the url of your grow, then go to settings. In settings go to edit sig. Hit the earth chain link button and enter your url for the grow log.