cut slits in the bottle so you can get it around the fan.
add tape
c of green Reviewed by c of green on . ? i have seen some how to carbon filter threads but the average cost after the fan is $150+.i am getting ready to build another 10$ carbon filter and was wondering if you would like a how to?it is good for a small cab grow or a drying room.i currently have one in my veg with 18 plants...cant smell a thing unless i put my nose to the plant(then it is quite potent) Rating: 5