Thank you bro for all of the info you've provided it's helped alot. VPD and plant diseases / fungus are the two areas my research had lacked and I'm currently reading up on VPD and LVPD and using an online calculator. I suspected my night time humidity was my biggest problem but man, worse than i thought. Still waiting on the dehumidifier but in the meantime going to be thinning them a bit for sure. When it arrives I'll probably set it to run when lights are off and turn off when they come on until end of flower. Gonna shoot for around 68 degrees at night with around 40% RH at night with around 80-85 degrees during day and 55 to 60% RH like you've got going. There's only natural levels of CO2 in the basement so I don't want to push it too high.
Note: Tried lowering AC, night temp went to 72 but the humidity shot to 81. It's probably been doing most the work definitely thinning a bit today and hoping that big dehumidifier comes soon 🙏
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