Put it in the exhaust pipe, It will decrease, but not elliminate the odor.
llamaman666 Reviewed by llamaman666 on . active carbon question ok, I have about 8 cubic feet size growbox, there are 2 PC fans for exhaust and 2 holes for inhaust. I grow 1 plant. I have a net(bag with big holes) of active carbon. now, if I put that bag by one of inhaust holes, will it eliminate the odor ? I'm asking because I'm not flowering yet. Rating: 5