hmm well i guess id have to see how bad it got for smell. odors are not a huge problem at least not yet. the plants i have now seem to really ramp up their stink when the lights are off(and they arent suffering from ph issues) and i can only smell it when i walk into the area where my tents are....for now. as soon as they really stink i will have the filters goin on both tents. they are already set up for them just havent had a need so far. the aquarium smell i guess i can live with or can just cover it up with something like a good candle or just hoot a fatty.