My plant is dying! Help me

My plant started dying after adding an AC unit to my grow room, I am not sure if I am overwatering it but some of the leaves are getting yellow on the bottom and all the big leaves are just falling down and are very soggy.
I am growing an OG Kush, it’s a fem from seed and I’m growing indoors I have a TSL 2000 LED light and the temperature is varying between 77 and 85, humidity is between 40 to 70%.
This is the most shocked plans of the AC, my other two plants are also not doing good but they’re not yellowing or dying like this one.
Do you recommend I add any supplements to the soil because I started with Foxfarm?

hey bro looks like over/underwatering to me. what is your watering routine? are you doing the wet-dry cycle? only watering when dry etc?

Before the AC, I was watering every other day with small amounts, I didn’t change that till lately.
I thought it might be over watering and I stopped watering them because it seems the AC isn’t allowing the water to evaporate. But even though that I’m not watering now and the soil is still a bit moist, the plant it’s doing that good.

ac should only help unless you have the cold air blowing directly onto the plants.

if you are hitting 85 then just have the ac come on at say 80, and try to keep humidity at like 65-70% for veg.

most likely its just overwatering. have you tried picking up the pots to gauge if it needs watering?

heavy - don’t water
light - water

if it was hungry you would be seeing deficiencies, not wilting/drooping.

I’m not going to water for a while and see if it gets better, here’s some extra photos, do you think they might be hungry?
Plant 1


Plant 2


Or is it just the overwatering problem?
Thanks!

honestly have no idea sorry i’ve never used FF so you would have to refer to their documentation.

but i can tell you overwatering causes a bunch of issues that look like your pics, so yeah start there, let the soil dry out a bit so oxygen can get in, and if you get the right reaction then you know what it was.

these guides have both helped me when i’ve had issues

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“Overwatered cannabis plants are droopy with leaves that curl down. As a result of overwatering, leaves often turn yellow or show other signs of nutrient deficiencies (especially when it comes to younger plants and seedlings!)”

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