Twisted and clawing leaves on new growth - really could use some help

I have two plants showing these issues. Here is the album of them both.


Close ups:
These two plants in particular are showing leaf tip curling and twisting on the newer growth.

I had a fan directly pointed at them over the weekend because my house AC died and had to wait two days for the repair. My idea was to get air moving across them. The fan wasn’t on high but it was directly blowing into the canopies of these plants. Started noticing this on Monday, and I’m still seeing signs of this Thursday. The tent temp during the weekend AC fiasco was 89-91f and 70% - 75% RH from Saturday morning to about noon on the following Monday.

Here are the details:

Watered on Saturday with dechlorinated tap water ph’d to 6.55. 4ml of CalMag to 1 gallon added.

Soil is Fox Farms OF with 30% perlite and amended with dolomite lime to buffer the ph.

Soil ph is sitting at 6.3 (last reading taken on Sunday evening). Not sure the accuracy of this digital meter I have but that’s the reading I got from almost every pot. They all have the same soil mix and water routine up to this point so I can believe it for now.

Temps in the tent are between 77-80f with an average RH of 55%.

New light added this past Saturday. A Maxsisun PB2000 (SF2000 equivalent). I started it at 28in for a couple days to break them in. Moved it down to 24in and it’s currently been that height for the past two days.

Both plants got 3000ml of h20 @ 6.55ph at the last watering with a dose of CalMag. I’ve given CalMag at 3.5ml per gallon every other watering since week 2 and have not seen any issues. Both are 5 gallon containers. Watered them when dry, so not sure if it could be over watering. Haven’t done anything out of the normal routine.

Just wondering if this could of been due to the fan blowing on them so ferociously over the weekend. It’s odd to me that this isn’t isolated to one plant and it’s only showing on new growth, so I’m leaning towards the fan stressing them out.

No leaf discoloration, nothing wilting or dying off. I’m just kinda confused as I’ve had a few out of control variables over the past few days (no ac, fan left blowing directly into them) on top of a watering and adding a new more intense light.

Bump. I’ve had another person on another website tell me that to them it seems like heat stress. Could it be?

So I just had the same problem and I put em outside in the sun and they snapped back literaly by the end of the day im not sure what the problem was I have a pretty good light i have the spider farmer 4000 heres what they looked Ike at first

here's how the 2 that looked like that look after 2 days of sunlight

I litetaly have same story as you I use fox farm OF but I cut it down with a little peat moss and a little organic soil then after 2 3 weeks I slowly start adding fox farms trio nutes...at 1/4 Strength...my auto flowers are doing great but for some reason the regular girls are not idk if I had to much in 1 space and not enough light or what but imma keep the other girls outside and hope no-one sees them lmao and keep my beautiful 1st time auto flowers inside and get my sprog net going....i also had problems with my last grow were in the middle of flower mh leafs were fisting and burning bad and i couldn't figure out why and this time I started having these problems right from the get go...I think next grow imma steer away from fox farms all together happy growing

@South_buff thanks for the replies man really appreciate it. I am leaning towards it being my light the more I research around. I've got it up at 28in currently and I am just going to leave it there. This 200w QB light replaced a 265w (actual) full spectrum COB, and this new QB is putting out so much more light, it has to be that I am pretty sure. I might of just gotten a little over zealous with the height placement. My soil PH is 6.5, the water going in is plain tap @ 138ppm and ph'd to ~6.5 with a shot of CalMag every other water. My runoff after a watering is around 6.9-7.1ph and coming out with 230ppm. I have dolomite added to my soil, so I think it's just buffering the passing water. The actual soil ph tests between 6.3-6.6 on average across the past two weeks. All of that combined with my average RH and temps, it just confuses me.

But yeah I agree, I might be ditching FF on the next grow for something like Coco. Happy growing man, take care.

Yea im pissed cause I think its the light to i only had a 1000w led last grow and didn't have this problem...but i didn't have enough power/watts during flower...so i bought that expensive spider farmer 4000 and now im having these issues and like I said i threw outside and they look like totally different plants.....but now I'm trying to figure out if I have lack of nitrogen or Calcium deficiency....check out this close up