Thanks, this helps and your other posts help quite much, the other link I posted was to a grow1 carbon filter on amazon that was 4" x 8" and rated for 150 cfm, if I can get the link to work ill repost it.
Sorry about that, here's the link I posted earlier that didn't work, fixed it, can someone tell me if this filter would be a better option or if anyone has any experience with this particular filter or with this company that makes the filter? http://www.amazon.com/gp/aw/d/B004OGY8XG/ref=mp_s_a_1?qid=1365618201&sr=8-2&pi=SL75