I've been reading about odor control. There are many suggestions for ONA, and ways you can build your own fan operated air cleaner. All very good ideas (i'm always looking for the poor mans solution). Ok, here's the thing ONA has about 7 different products... the original ona block, ona gel, ona liquid, ona pro gel, ona pro block, plus mists and dispensers. I just want to neutralize the odor from a small grow closet, 4 x 5, 2 plants, now drying. The smell was pretty much under control while growing because of the exhaust fan, which was run by a temperature control sensor, but now the fan is off and the buds are drying, and man does it smell. I was going to build my own air cleaner using instructions I found here. A bucket with holes drilled in it, some ona in the bucket, and a fan pushed face down into the bucket. I thought it was a great idea. I don't know which ona product will be best for my needs. Anybody here have suggestions? Thanks J