Roots look pretty healthy!! What are the temps in your res?? What's the ppm/EC of your res??
Looking good though!! Looks like those leaves are curling upward a bit.. How far away are your lights/fan??
JT
I'd say a good next step is to get some monitors for your grow area!! I got my enclosure monitor for $8 at a local hardware store and does temp/humidity with a 24hr PEAK/LOW memory, and I got an aquarium thermometer at a pet store for $6 that will go into my res when I finish building it.. Those 2 things are extremely helpful!! As for an intake/exhaust fan, not sure what kind of space you have but as it seems a bit standard to use CPU/computer fans since they can be wired up easily and move a fair amount of air..
JT
Is there any way to take a picture of the area around where you're growing for a better idea of how it's set up??
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Is there any way to take a picture of the area around where you're growing for a better idea of how it's set up??
Temps are low because the lights had only just came back on

(Big ass root coming out of the pot

I've got a few ideas, but that is an unusually difficult spot to air out.. I'm almost thinking if you had a way to use the lower door-jamb area to draw in cool air and somehow vent it out of the top of the door.. I suppose it depends on how covert you want this thing to be.. You could always purchase a cat/dog door to install toward the bottom of the door and plumb some piping from a vent at the top of your tent to the cat/dog door with an inline fan to draw air out of the tent.. There are ways for it to be done, but they may or may not be all that cheap or easy to pull off.. Is there any way to vent to the floor above/attic??
I've also heard of people cleaning out old plastic soda bottles and putting water in them, freezing them, and putting them in their reservoirs to keep the temps down.. I'm not sure how well that would work with the 5gal buckets, but it's an idea.. Air movement would be much more critical though..