You dont want too much ozone, i read that it can be harmful to both your plants and you because of the free radicals(which attach to the scent molecules and take away the smell. Karma recomended the ozium for me in another post and it works great, the carbon filter should work as well. I had a weird idea of my own, what would those baking soda boxes for refrigerators do. They absorb smells from my fridge what about the smell of MJ in my closet, an experiment may be in order.