I agree with Dairon here that you've fed them much too early and probably much too much... and the Gelato is definitely showing signs of heat stress with the curling leaves. Try to get your temps down into the lower 70s and back off on your nutes a bit (might think about draining your reservoir by half and filling with plain pH'd water to cut the concentration of nutes - definitely check your ec) ... the curling leaves on the Gelato will uncurl when the heat is reduced but the burnt tips on the Gorilla Cookie will remain...
Good luck!