I doubt the little filter squares would have any noticeable impact in odor, if they do, it will be short-lived.

Check out this link.

http://boards.cannabis.com/growroom-...+carbon+filter

I made one of these, modified slightly, for about $50. When the Activated Carbon loses its effectiveness, the carbon can be replaced for about $15. It works very well.

I first tried a product called ODOR-SOCK. It's a fabric type of carbon filter for can-type fans. it worked very well at first, but would lose effectiveness in about a month. :wtf: I wouldn't recommend it.

PS: "Just a couple plants" can be *pretty* stinky.

hth