By the looks of those trichomes you don't have much time left till harvest, so it seema fine to me. Usually the lower leaves of a plant yellow out towards harvest date. Not uncommon for a few upper leaves to follow suit.
Are you using peat moss? I get what appears to be this kind of mold on my bales of pro mix (peat moss) quite often. Their website states that it's not harmful provided it doesn't become so large as to cover the soil growing surface...
Any chance the pots are to small for the plant? Perhaps beginning signs of root bound? I usually consult "The Growers Handbook" with my problems, here's what it says for leaf curling:
Personally, I'd be pruning those fan leaves a little for some better light penetration to the buds.. and like said above, humidity should be closer to 50%..
Hey, just thought I would add something to this conversation. I had contacted blue labs prior to asking y'all about how long probes could be in ro water but hadn't had a response from them. I just received a response in asking about how long the probes could be in RO water to test its pH. I...
What is a long period of time in your opinion? A couple hours? Even less? Would I be pushing it if it's immersed just long enough to determine and adjust the pH of my RO water, approximately 20 minutes? Normally I wouldn't even suspect this being a problem but as of recently I'm having a lot of...
I'm curious how things have been growing since you re-potted and raised the lights. How's the new growth looking? Less yellow and twisted? I've been having a similar issue with some first week into veg clones.