OK so here is my latest invention/idea: A super air filter for marijuana smoke. Take 4 gallons of 35% hydrogen peroxide 65% water solution and dump that into a 5 gallon bucket. Take 15 pounds of pure citric acid powder and put it into another 5 gallon bucket and thoroughly mix in 4 gallons of water. You blow air into a tube where the mouth is connected to a one way air valve (so the water pressure won't push smoke back out of the tube after an exhalation) the end of the tube goes to the bottom of the hydrogen peroxide bucket, having the hydrogen peroxide bucket sealed with another tube coming out of the very top where the air settles which takes that air that has been filtered by the hydrogen peroxide and sends it to the bottom of the citric acid solution. When it comes out of the citric acid I think all smells would be completely removed. NOTE: I've tested the citric acid filtration method without the hydrogen peroxide and it worked quite well, except that having marijuana smoke go through the citric acid slowly reduced its PH balance and made the citric acid become more base and thus non-reactant and THUS unable to filter the smoke/scent properly after a lot of smoke has gone through it. My hypothesis is that the hydrogen peroxide will take the brunt of the smoke/scent out of the air while the citric acid will perform a secondary cleanse of the air. I also believe that if this filter was scaled up to two 55 gallon barrels of hydrogen peroxide and citric acid it could be used to kill and remove: radioactive fallout, fungus, viruses, bacteria as well as dust and pollen for pure air in a room or maybe even the whole house. Any questions? Comments? Please Register or Log in to view the hidden image!