Odor control questions?

I am aware a good phresh carbon filter sucking air in then out through an inline fan and into exhaust ducting is good to remove odor. However, even scrubbed slowly, I am sure a little odor escapes the exhaust. I saw a cone style hepa carcoal filter that looks like it would be placed on the end of the exhaust? I can't see this being the primary carbon scrubber, but maybe a secondary one at the end of the line? This filter is expensive, the same cost as a new virgin carbon cannister. Anyone ever use one of these?

U need a diffrent Carbon filter go to a hydro store that's why the odor is getting out !

I don't think you read the post carefully. The pictured filter is supplemental to a phresh carbon filter and inline fan combo.