Whats happening to them???

hey dude, my ph is 6.7. I dont know if they have overgrown the pots, but i see not root tips at any of the drainholes, so i guess they havent (but i t could be possible).

Now i just left one whjole side of the tent open, plus the vents, that seemed to have worked very well, theyre all looking fine now.

I dont think ill be getting bigger pots, but i will if its absolutely necesary. Soil could be a tad compact due to the low temps out there, but i got em some heat, and that didnt do anything...

looks fine, water should perc them up

do you have a moisture meter for the soil? they sell them cheap at home depot.
what time of day are you noticing the droopy/wiltiness? I have seen many a plant droop alot at night and pick back up in the am, as if it is normal for them to do so as per their dna. but usually is whole plant and not a set of leaves.
your ph is right. you nutes seem right. you havent stated what your Relative Humidity is. are you using straight soil or is there any vermiculite or something similar to provide more airflow to the root zone?
If you have the ph correct and nutes correct along with temps, than it only points to the uptake of nutes in the soil @ the root zone. so I would contiue to focus there. a cheap soil moisture meter would rule out if you were having problems here.
post some updated pics again.
There is something going on and you need to contiue to delve until you find it.

thanks dude, im gonna try n get a humidity meter for the soil. I am not preety sure what soils got, but its supposed to be best seeding soil i could find here. ma friend grows, hell of an experienced grower, told me ONLY to grow on that soil. Its got some peat (little) got some worm shit lol got perlite and a lotta nutes. Its organic compost mixed with the worm crap.. They were fine today,. i gave em hella lot of more ventilation (opened one whole side of the tent). That worked a bit since they didnt wilt.

Usually yea they tilt a bit at night perk up at day, but thtas kinda slight wilting and regular through the plant. Its getting better, ill get some pics tommorrow n see how theyre doin

thanks smokey