I have my fan (Air Cooler) on 24/0. it is on low and it blows between the light and the top of the plants.
Is it OK to let it work 24 hours a day or should I turn it off?
It is both, my main circulation and it also keeps the light cool. It seems like others keep it on all the time and it doesnt hurt the plants. I guess, I'm gonna leave it on since it doesnt hurt anything.
i would too if its your vent. i dont have that problem or heat so i just tied it into my system breezy during the day calm at night just like most days
I too leave mine on all the time, on medium, with every grow. As others said, it makes the plant sronger, thicker stem, and it also helps keep flying bugs off them (not completely, but helps).