I have a DIY carbon scrubber for my bagseed plants in flowering but there is still a noticeable smell. I dont know if its because its a DIY or if the store bought ones work better. I have a thread on the cabinet that shows a pic of the carbon scrubber. I would post a link to the thread but I cant figure out how, but its "Just built this cabinet, tell me what you think". I think a search would bring it up