deeunit1answered grow question 4 years ago Some of the new autos show different phenos but nothing like this.It could be your PH.The dark ones have nute burn and the others look too light so I'd flush with PH Correct water then giver then a light feed immediately after.Some autos can't take a full dose of food.Is it coco or dirt.Are you using coco nutes.Check your PH.Take it easy with the fans.Wind can cause clawing,you only need to mover the air around,it doesn't need a breeze.I'd take that Co2 out for the moment.It could be too high.Curling can be a number of stress related things like disease so remover Co2.My guess PH.Nutes locked out on those 3 and burning the others.Certain nutes become unavailable.