I swear by ozone generators. I'm in an appartment. Just dont be cheap in your selection, you really do get what you pay for. Keep the grow and the ozone in a seperate room if possible, and you can crank the mgph past reccomended threashold for ppm safe for humans.

At aprox 60-70 mgph in my den with the door closed, you walk through the front door and cannot even tell i smoke cigs in here let alone grow. The higher levels of o3 in the den kills the growing pot odor, and residual o3 is circulated periodically whenever the fan kicks on and air is circulated throughout the rest of the appartment.

Just be careful cuz if your unit is a big bad boy, o3 can be toxic even to the plant. For a small number of plants, I love ozone. Its easy too, plug it in turn it on and your done. Fits all setups No pipes no tape no carbon rocks all over.

Incense and the occasional spritz of whatever air freshner never hurt either. I also swear by ozium :P