The gel works ok to mask odors, but tends to leave this "chemically clean" smell , especially in smaller areas... Kinda like industrial bathroom air fresheners in malls and hotels and such. If you can put it right next to the exhaust outside the cabinet/box then you should get good results.

"Why does it smell so hospital clean in here?" - Heh that would get me busted faster than the bud smell

Theres some good plans for a scrubber type filter on here somewhere - thats your best bet if you have the space and a little time/money

Good Luck!
Tokudai Reviewed by Tokudai on . ona Block, Odor Elimination Has anyone used this product befor? I was told by a poster on another board that he uses this for his small grow room and it works great. place this solid block in any room to neutralize odors, and keep air fresh. ONA (Odor Neutralizing Agent) products are designed using scientific principles of molecular bonding.Two odors can offset one another when they combine to form a bond. ONA's active ingredients come from a blend of 32 essential oils and plant-derived compounds that bond with and Rating: 5