Need some help here guys: got a 4x4 tent 6inch inline fan with a carbon filter carbon filter is hanging at the top of the tent AIR in tent> Carbon filter > air cooled hood > in line fan > out tent We have 4 blue dreams, and the entire place stinks of pot...there is slight negative pressure in the tent, but its not containing the smell....I dont get why. I ended up duct taping the air flaps closed slightly to hopefully cause some more pressure, didnt help at all... Had a spare 4inch inline fan + carbon filter, hooked that up and have it laying on the bottom of the tent, there is a lot of negative pressure now but the smell is still as strong as ever!!! The air isnt being exhausted outside the room to anywhere, it is exhausted into the room freely, but there is still smell even with 2 carbon filters now. What could be the problem??