Its a closed grow so theres no intake/exhaust... I have 2 wall mount fans and a small fan for the floor.
Well the carbon filter is mostly used for smell. If your not worried about smell then you dont need one. But as Colonuggs said and you totally brushed off, You need Intake/Exhaust fans for your plant to get the Clean air in and the bad air out. Once the Closed space runs out of Co2 where is it gonna get the Co2 that it needs to survive. By the way, If your plant doesnt have smell by flowering time then you got shit weed man. Good luck
youre trying to run a sealed grow in a tent?
Tents don't really seal, unless you've got some special model that I've never seen.
well you should have said you were pumping Co2 into the room. And also when i said 85% of the smell is gone by a carbon filter i meant it reduces the smell to almost nothing. wasnt trying to be rude or nun :/ Also think of a ballon. you pump air into it so where does all the air go.