leaves curling up at a rapid rate.

I recently got some plants of all different ages. I have no idea what happened up until this point (no real good history of the plants). I can tell you the plants are in a 5x5 grow tent with a 600 watt hps light air cooled by a 6 in fan. Anyway one of the plant's leaves have been curling up or rolling in on its self. This happened quickly in a matter of a few hours during the light cycle. Im guessing this plant is a week or two into harvest. i have never grown before and im totally in over my head. Usually our collective just gets the meds from our farmer members but someone was selling their grow set up for a good price with the plants included. I figured now is as good a time to learn as ever. i have searched the forum for answers and found this could be caused by over watering, underwater, too might heat, not enough heat, too much light. Basically all kinds of contradicting information on the web. So i posted a few photos to see you guys could help me out.

Are the leaves crispy or moist, hard to tell from the pic's and I don't have my glasses on, lol.

Look through the plant problems section. Therell probably be an answer there. Look up leaves curling up. Plants are easy to grow if you remember to water them. Dont crush them with nutes, and keep the temperatures in the right zone. Dont water the plqants until when you poke your finger in the dirt it feels dryish. And you probably mean that the plants are in the flower cycle not the harvest, ya? Anyway, if you have them under 12/12 lighting everything will take care of itself after you stop doing whatever it is thats pissing your plants off. You probly know what it is already dont cha?

Could your light be too low? Looks like its only on the top

I lifted the light and the rolled up leaves are crispy and britle out of 20 plants this is the only one acting like this

Did you cause any root damage, sorry not sure if they were replanted or what, but if it is crispy then I doubt it's over watering, not sure of course, maybe that plant is getting more heat than the others in the tent. Take a pic of the grow environment too if you can there might be a clue there.

Those look super weird, PH problem? But if that's the only one doing it... then maybe it's a root problem? Jeez... I have no idea

It hasnt been replanted to my knowlage but i only had them for 3 days attached are pictures of the grow environment and a picture of a plantthat has been flowering longer i also attached a picture of the lower branches and stem.
Grow enviorment red is the plant in question green is a hot shot becuase of some spider mites on a plant we removed just precaution (hopefully)
This is another plant that is already showing some good buds

These two picture are of the plant with the curling leaves

Well if you do have spider mites then id check under the leaves on that curly bugger to make sure thats not the problem. Get some lady bugs off amazon. A bag of 1500 is like 15 bucks shipped, they work great and if you have mites they wont be going away any time soon. Doesnt look like that plant should be suffering much heat stress though so i dont know man. If you havent been pounding the nutes to her then its a mystery.

Yeah nice setup OP. Seems strange that one plant is struggling but the rest aren't. Maybe something got damaged in the move or as Alienwidow suggested you still have spidermites.What is on the floor close to the plant? Is it a fan?

Thanks for the lady bug tip im going to order some. Yea that's a fan but i have been blowing it toward the walls so the wind isn't directly hitting the plants. That plant was moved to the front corner after the leaves started curling, it was directly in the middle. The light was also raised because i was worried about heat stress

OK, well it should recover then if its was a heat problem because of it's position., let's us know what you discover and if it recovers, I for one would be interested.