If i was you i would try flush them with ph balanced water and take out the superthrive & DN, that much superthrive on plants that young cant be good I use less for my mature plants + your using fox farm soil it has more then enough nutes+vits for them atm.
Also i would move the lights a inch higher if theres any chance of heat getting to them while they recover.

Ive had a few plants go like yours before they get like a week behind healthy ones if your not carefull but ive had very few die on me. If your lucky it'll be fine in a few days

good luck