Here is one of my setups that is not in use at the present time. The tire is not necessary as long as you attach a brick or two with stone diffusers as they add weight on their own. This set up was originally used with a rubber membrance diffuser which requires more weight. I really like using the garbage can lids as a base for all my diffusers.



If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.