So I'm setting up a decent size grow box in one of my closets, Im only going to have 1 plant growing using hydroponics and an LED light. Obviously I don't want this one plant to stink up my whole house so for the carbon filter I was thinking of buying the cheapest shower fan from home depot then mounting that on the top part of my box then using the ducting I would have the air be sucked through the fan then the filter then I would recirculate it back into my box. Can I recirculate my air once it's passed through the carbon filter? I'd not, how strong of a fan will I need to keep up with the exhaust system, it is rated at 50CFM and my grow room has a volume of approximately 35 cubic feet Any help is truly appreciated -Cheers