Drooping plants in DWC

[Tersky]

Auto Grow Sour D haze and ak48.

Hey guys its been a while i know. Having a drooping leaves issue with my plants and i can't figure out what is causing it. I have attached pics of the plant and roots. It looks like overwatering but i cant seem to correct it. I have the plant in a 2gal bucket with a large air stone. Use GH Flora series with Hydroguard using schedule on GWE. pH ranges from 5.5-6.5 PPM is 750ish humidity is about 50% and temp ranges from 70 to 77 F. No signs of pests either. I changed the water Friday (tap water set out for a few days) and on Sunday they were looking bad. Changed the water again and cleaned buckets and they perked up last night but have gone back to drooping again. have been testing and maintaining pH at least twice a day. Any thoughts?

Was wondering if it could be because my nutes/hydroguard are about a year old (have ordered more just in case)? Root rot is another concern although it does not look like the roots are having issues to me.

[DW2]

Howdy Tersky, good to hear from You,
What is the temperature of your water? I had a similar problem during the last grow, drained and fed fresh nutes and wham! wilting and drooping leaves, stems bending, instant PANIC mode! I had also adjusted the pH in the reservoir prior to the drooping. I first rechecked the pH and it was within range, but the only thing that I could think of doing was to drain and start over. The re-do must have done the trick, because the plant had perked up by later on that afternoon. I had been keeping a couple (two gallons per reservoir) of gallons of pH'ed water in the refrigerator, over night, to help keep the reservoir temperatures down, I guess that the water was too cold and shocked the plant, the refill water was around 64 degrees F. (out of the tap). I still add some chilled water at the feedings, but now, I do not use more than one gallon per reservoir and add it at the end to lessen the chance of temperature shock.

[Tersky]

DW2 The temp is room temp so 75ish.

I should also note i am growing in a tent (2x4x5) with carbon filter ducting and decent inline fan and a small desk fan for circulation. I have not changed/cleaned carbon filter and was wondering if that could also be an issue. The temp is fine but maybe air quality? Im at a loss lol

[Tersky]

ok only thing i can think now is wind burn? i have a small fan on the interior of the tent but i thought it was not hitting the leaves but maybe it is...turned it off and will see