Well i am kinda using co2, i have a small propane heater in there durung the dark cycle. i leave just the pilot on my buddy did it for years swares by it as long as you keep it above the girls. During veg and even now just not as much i spritzed them with seltzer water, i kniw sounds hoky, but thats how my canopy got out if control in the first place.
But i was told for my first grow to use these two strains cause if thier very resilient, mildew and mold resistant as well as insects dint bother them i guess at least i havent seen any.
i do have one that has me concerned, it is starting to brown spot on a few leafs. its the only one im having issues with its short kinda ok but i thinkin it may be a different strain, i run my room cold 70 with 35-40% rh at the momentduring veg a little hotter and humid 75/80 60%rh but time will tell