You want a Charcoal filter also?

W/ a 250 just go grab a 4" in line W/ a Charcoal can you will be fine

Good Luck GL420:jointsmile::jointsmile::jointsmile:
GreenLeaf420 Reviewed by GreenLeaf420 on . Newbie with cooling Hey all, I need some help with cooling with an inline fan, i have a 250 watt hps, so how much cfm do i have to move to be in the green ? Rating: 5