Quote Originally Posted by Jeanne
Mix 1 cup of white vinegar to 1.2 tbsps of baking soda. It makes 1.2 gallons of CO2.
http://www.alysion.org/euthanasia/index.html
I was just about to post that i found that website, but you got to posting it before me. I am thinking that i am going to use this method. It is very cheap and easy to do.