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Got rid of the room humidifiers that need refilled every two hours and only raise the RH by 3%. Got a whole house humidifier from Amazon for $130 and hooked up 6" inline fan to it, hooked it up to the water line and put it on an Inkbird RH controller. More RH than you would ever need. Looks...

May be a dumb question, but, if I have fresh air coming into a 20x25ft room via an intake fan, and I have my ac running, do i have to run an exhaust fan sucking air out? Because it obviously pulls my cold air out.

Is this potassium? I have one plant out of 12 doing this. The others look okay. DWC, plenty of air, good RH and temps.

I grow in a large grow room, I run 12 - 8gallon buckets in an RDWC system, running 4k in HID. Would C02 be an option, or just a waste in a room roughly 20x20. I can just pipe in fresh air like I always do, but was wondering, if I cut the intake of fresh air and crank C02, would it be a step up...