it's hard to know exactly what it is without some background info
you def got a Mg lock/def and a N def.... otherwise you got tip burn that looks like over feeding.
What is the pH of the grow medium?
We also have already told you , You need to get them plants into some bigger pots, I am sure they are extremely rootbound.
In your other thread we told you what to do and the info was not taken and used.. so good luck with your plants man