Quote Originally Posted by grey1223
A carbon filter is the only way to go. It will last years.
Activated carbon has to be replaced to stay effective. Usually after 2-3 grows, it's starts losing effectiveness and will need to be refilled. So, it's good and certainly effective... but it's not the only way to go. Some of the prefabricated filters can be insanely expensive.

Mushaboom:

Here's a pretty cool odor neutralizer that's inexpensive to build and maintain. They're really easy to make, too. Made one last weekend just for the hell of it.

How to build your own inexpensive odour neutraliser...

Never used Ozone before, so I don't have much to say about it. Just don't keep it blowing on your plants, as I've heard it can damage/bleach the foliage. Take care.