Tacoing and Slight Droop

I have a bagseed in a tent for a test grow before going with a full run:

Growing Medium: Miracle Gro Natures Care Organic Potting Soil (this was started by a friend, will be transplanting into Fox Farms Coco Loco with Kindsoil
Nutrients: None added as this seems a bit hot itself, just water
Water: Tap Water, City report shows acceptable PPM of contaminate matter, PH tested with HANNA PH/EC/TDS meter, comes out to be right at 7.0
Light: Black Dog LED Phytomax-2 400
Footprint: 3'x3' tent

Environmental Variables:
Temperature maintains a steady 84-85 degrees measured at canopy level (Inkbird Temperature controller, and a remote temp/hygro sensor (also Inkbird)) during lights on
Temperature varies from 74-75 during lights off (Exhaust fan does not kick on at this time)
Temperature is controlled by turning on exhaust fan which pulls in air from the room that is maintained at a lower temperature using a Whytner 14k AC dual hose portable AC. Room temp is generally 70-75
Air movement - AC Infinity 120 mm fan blowing slightly above the plant suspended.
Humidity - 50 percent when lights off, 45-50 percent with lights on

I noticed slight tacoing a while back, and started adjusting some variables, currently the light is 25" above the plant, it started at 19" and I raised it a few times, this doesn't seem to have made any difference
At first I had the humidifier set up in a way that the 120 mm fan was blowing the humidified air straight onto the plant, I moved the humidifier to another corner of the tent to avoid this

Please see attached pictures and ask me for any more information that I likely forgot.

Looks fine. No need to run humidifier, Ive grown at 25% no problem.

JoeBlow5823 said:

Looks fine. No need to run humidifier, Ive grown at 25% no problem.

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I am running one because I am also worried about the drastic change. See when the AC cuts on the ambient room humidity drops from about 55 (it is humid here) to 32. If I don't run an humidifier then the change would be from about 32 with lights on to 55-57 with lights off. Seemed like a pretty big jump to me.
Just wanting to make sure it looks ok, as I am preparing to top and start LST after topping.

dbz said:

I am running one because I am also worried about the drastic change. See when the AC cuts on the ambient room humidity drops from about 55 (it is humid here) to 32. If I don't run an humidifier then the change would be from about 32 with lights on to 55-57 with lights off. Seemed like a pretty big jump to me.

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Humidity outside in nature regularly swings from 20%-99% where I'm at..... The typical 24 hour period easily sees changes from 30-70%

And you should have your exhaust fan on ALL THE TIME. Plants crave fresh air.

I’ve experimented with the constant exhaust on, or only on to control temps that go above what I set. I saw absolutely no difference in one plant from the other. I was pretty shocked because I was for sure that having the exhaust on 24/7 would be better. I have one of my flaps open at all time, with 2 oscillating fans, so maybe the fans are pulling air inside, obviously not as strong as the exhaust. But I was surprised to see no difference. And I have my humidifier connected to my controller to keep my Rh between 50-60.

Dontjudgeme said:

I’ve experimented with the constant exhaust on, or only on to control temps that go above what I set. I saw absolutely no difference in one plant from the other. I was pretty shocked because I was for sure that having the exhaust on 24/7 would be better. I have one of my flaps open at all time, with 2 oscillating fans, so maybe the fans are pulling air inside, obviously not as strong as the exhaust. But I was surprised to see no difference. And I have my humidifier connected to my controller to keep my Rh between 50-60.

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Throughout an entire grow?

JoeBlow5823 said:

Throughout an entire grow?

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Yep, the entire grow. The only considerable change is dropping my humidity down to 35% the last 2-3 weeks of flower, but that’s about it.