you think the smell is bad now... Your plants are still babies. they will get exponentially smellier in the coming weeks. You will need a carbon filter to control the smell. An affordable ionizer or an ozone generator will not be able to handle the stink from 9 plants.

In an earlier post I linked you some plans for a DIY carbon filter (it's in the FAQ section). The parts are inexpensive, and most of the money will go to the activated carbon itself. Expect to spend around $50 for the parts, which is about half as much a fabricated carbon filter would cost. I too am a poor college student and this is definitely a worthy investment, as it will eliminate the odor for good.

peace brotha and good luck