I Think she's no good

what are you irrigation habits? do you ensure the entire pot gets wet or try to give a volume you chose? If you don't consistently water entire pot (fertilizer or not) then that could be part of the problem here... looks like general salt toxicity. So EC is potentially sky high in certain areas of the substrate with bad watering habits. anyway, the top looks like it's watered inconsistently, but could easily be fooled by still images. if you do the whole pot with minimal runoff in soil (10% or more runoff in a soilless grow), then you can cross this off the list of possible causes.. unless feeding too high, which doesnt seem to be the case.. the plant would be overly dark too. if concentration is high outside the plant cells by significant amount, osmosis will drain water from cells to compensafe for the concentration gradient in an attempt to reach equilibrium... so you get the wilted look you see here. Not watering enough can have same effect. heck, blast them with too much light and they can sometimes look like this... so, you'll have to think of recent activities that may be relevant... eliminate possibilities with deductive reasoning... and maybe it is a dud... maybe it's not. i've had a retarded plant before. Didn't process nutes quite right and was never healthy. 1/120+ at that point ,though higher if i add in runts.. had a 2-3 of those too.