G.Leave
Cultivators Club
That's good then, I'm averaging about 65% when the lights on with highs of 72% and I'm just working on my averages for when the light is off as this is they're second day in the bigger tent and I had a few problems yesterday with it being at 99% but today it's been between 55-60% while the lights been off with an average temp of around 25℃. I've seen a family members crop go to waste because his humidity was too high throughout flowering and the buds was fluffy with Mold inside and he binned the full crop bar a few the smaller buds that wasn't too effected and that was about 25 plants give or take, I definitely won't be making that mistake!
Strain selection will be key for success...search out strains based on mold resistance. Strong circulation will also help and silica additives are also said to help in high humidity. I grow outdoors and deal with RH exactly like yours(70%average).