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Old 11-11-2009, 04:34 AM   #13 (permalink)
farmergiles
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Trick is having enough carbon to absorb smells while allowing free movement of air.

The way an off the shelf carbon filter is built goes some way to maximizing the surface area of carbon while allowing free movement of air. I'm sure you can build something yourself but you might have to go to greater lengths than just having activated charcoal in a tube.
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