I have a diy carbon filter, (@arty zan diy carbon filter thread somewhere here at afn)not sure how much of the odor it is actually removing though.What are you using for odor control?
Yeah mine is made with pencil holders.Is your diy carbon filter the one that uses the mesh pen and pencil holders? I made one of those and it hasn't helped too much when things are in full bloom. I recently made an upgraded filter with some materials I grabbed from work. I need to add the granular carbon and hook it up to my cabinet. It looks just like a filter you would buy on Amazon