CalMag is definitely one of the cheaper supplements. I'm on a pretty tight budget myself, I got the small bottle of Vitalink calmag for about £7. I didn't think you were supposed to use calmag in flower though, because of the high N content I think? Maybe it's ok as an emergency fix, I don't know?
I also get little dehumidifiers from the pound store, it's like a plastic tub with crystals in the top that absorb moisture from the air and a tank underneath to collect the water. I use them around my flat cos it's pretty damp in here sometimes, they last a month or so. I don't know how much they'd reduce your humidity but might be worth a try. I have 2 in my grow room, only one's near the flowering plants, they don't collect as much in there as the ones in the kitchen and bathroom do, I take that as a positive sign. I have plants with brown hairs on the flowers now at 5 weeks into flower, mostly one of them but there's nothing wrong with the plant and I'm not worried about it, it's developing just as well as all the others so I don't think that in itself is necessarily a problem, or not in my experience at least. Maybe these plants were just too badly damaged before you got to them to ever really live up to their potential? It doesn't mean the smoke won't be fine though, just be patient with them. At 8 weeks in you're nearly there, good luck with it
