whats wrong here?

Its regular promix hp. Ill let them dry out, and shufv the t5 closer. Thanks everyone for the info , love rollitup

I have never used promix.

Still my guess is this.
The plants used up their own food storage stretching for the light and are currently starving.

Wait for a promix guy for a confirmation though.
Good luck

Also im not sure what ph to shoot for with promix.