I recently went from veg to flower in in 4X4 grow tent. Previous to this, I left the 2 7X15 vents open for airflow, but now that I am in flower I have to close those to prevent light from entering my tent. I replaced the openings with 6' ducting X 2, but now I have negative pressure in the tent.
Is it better for me to reduce the amount of air the fan is trying to pull out of the tent or should I try to allow more air into the tent? I understand that a little negative pressure is OK but my tent is really pulling in.