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
jimm1432 Reviewed by jimm1432 on . PLEASE HELP MY PLANTS! What is this??? NYC DIESEL These are one week NYC Diesel Seeds from Soma..60% sativa 40% indica. I see a rusty color on these leaves, I suspect nutrient deficiency but i have no idea, thats what i have just found by reading my books. I really need help from some of the Mods. It also could be "bruising"? i have touched the leafs a bit to get soil off. Or even Manganese deff? T-5 Lamp Fox Farm Oceanic Soil PH at 6.5 Feeding water and 5ML of Diamond Nector with a 1/4 tsp of Super Thrive all in a one gallon res. Rating: 5