A little background of myself- I know organic chemistry I was extremely baked last night and was thinking of a better way to filter/diffuse the harmful components of smoke from cannabinoids. I was thinking of all of these flaws that came to mind regarding just plain old water diffusion through percs. Although water pipes do filter out a lot of heavy dense ash debris, the majority of micro-carcinogens and smoke dust particles still manage to make it through to the users lungs. When a user takes a hit of a waterpipe, the smoke meets the surface of the water and the surface tension of the water encloses the smoke to form a bubble that isolates the non-polar smoke from the polar water. The bubbles are continuously divided and move quickly but I thought of a flaw in the efficiency of water diffusion. The smoke particles in the bubbles are moving at relatively the same net speed as the bubble so the majority of the smoke particles do not contact the edge of the water. Also the surface area of the smoke inside the bubbles is astronomically greater than the surface area of the walls of the bubbles. Another flaw is that the surface tension of water is very strong, especially for anything with a low density/high surface area. Many bugs can walk on water without ever breaking the surface, the same would apply to light carcinogens. My theory is that when the smoke particles contact the edge of the bubble, some of them bounce right off the surface of the inside of the smoke bubble and never diffuse through the bubble into the water. Another flaw is that non-polar carcinogens and other smoke particles will also be very insoluble in water and will avoid contact with polar solutions such as water thus keeping them away from the walls of the bubble. Now I was trying to think of another type of diffuser that would work and the ROOR carbon filter came to mind. Absolutely retarded idea. Activated carbon is used for the following: Adsorption of organic, non-polar substances such as: Mineral oil BTEX Poly aromatic hydrocarbons (PACs) (Chloride) phenol Adsorption of halogenated substance: I, Br, Cl, H en F Odor Taste Yeasts Various fermentation products Non-polar substances (Substances which are non soluble in water) Read more: http://www.lenntech.com/library/adsorption/adsorption.htm#ixzz0iEA0nCB3 WTF? THC and cannabinoids are very non-polar. Anyone who has taken a chemistry lab and has used activated carbon knows that it has a high affinity for non-polar organic compounds. THC and cannabinoids are extremely non-polar. Activated carbon is also used to remove phenols. Activated carbon is also useful in odor control and water purification to remove taste. A large number of taste and odor compounds come from large bulky aromatic ring molecular structures and tannins. AC also removes large bulky molecules that do not have a thin shape. So whats the point? Cannabinoids are terpenophenolic compounds. They also have very bulky ring structures that make them very easy to get stuck inside of the AC pores. In other words, AC is designed to filter out compounds that resemble cannabinoids. ROOR uses dry AC but it makes no difference, the principles are the same. The reason there is so much less taste is because of less tannins/cannabinoids. So my completely blitzed self went out the next day and picked up some wet AC at Petco for $10 that they use for aquarium filters. I filled up the beaker bottom of my bong with AC and put just a little water in so that when I took a hit no bubbles would jump out from the activated carbon slurry. Now why the hell would I do this if AC seems so flawed? Simple answer- it's healthier- the majority of small smoke particles are removed, carcinogens removed, and much cleaner hits with a crystal clear high. The taste is lighter but seems to be much more fruity and I can really taste the differences in strains. I really didn't notice a reduction in being high, maybe because of all the shit that is filtered out so the cannabinoids contact a greater surface area of the lungs that arent clogged with crap. But what about all of the lost cannabinoids that were absorbed by the AC?There is a solution . When the AC starts to get old, I will just pour it into an open ended PVC pipe with a screen at the bottom and will use a butane extraction to make hash. Butane is sprayed into the top of the PVC pipe. Butane is normally a gas @ STP and will act as a liquid solvent and will saturate the AC pulling off the nonpolar cannabinoids. As the butane evaporates, the sticky hash is left behind. I will give this a try and will let you guys know if any killer hash can be extracted. And one last thing, use an ash catcher so that ash and big chunks of herb don't end up smelling and rotting in the AC.