I don't care what the studies say about percentage of THC removed. Bong hits get me ripped, and nothing can change that. The reason I use them is not to filter out chemicals but to cool down the smoke so I can take in nice big hits.
ermitonto Reviewed by ermitonto on . How Much Does Bongwater Really Filter Out? How Much Does Bongwater Really Filter Out? In my estimation, smoking weed, in terms of actual smoke damage to the lungs, is as dangerous as smoking an unfiltered cigarette. In your estimation, how much do you think pulling the smoke thru water decreases it's toxicity? Rating: 5