Flowering Stage Question

Getting ready to put them into the flowering stage, question is, should i keep a fan running all the time?

oh yes. most def.

oy yes just leanrt the hard way. my humidity at night in veg was 55 to 60. now in flowering i saturate the coco wich make the humidity go way up. opened my tent last 2 days to find a reading of humidity 85 and little wet spots on the outer part of the leaf. so now my oc fans and intake vents run at night. temps drop to 62 but better them mold of mildew