:?:all marijuana plants in a inclosed grow box has to have ventalation:?:
S SmokinJoe113 Active Member Nov 22, 2010 #3 You can usually get by with an exhaust fan up top, and vent holes down low for fresh air to enter. You should have a fan in there pushing air around too. What kind of light?
You can usually get by with an exhaust fan up top, and vent holes down low for fresh air to enter. You should have a fan in there pushing air around too. What kind of light?