I recently had to be away from my ladies for a week and one of them experienced a ph lockout while I was gone. I returned to find about 3 rows of leaves stemming down from the top severely curled with many patches of dull green or orange. Now it's about a week and a half later and i've gotten...
I use a carbon filter on a typical fan and it works very well as far as the smell goes, I have a fairly wide open space so my temps have never been a problem, can't help you there.