Attach 2' of 1/4" tubing from the "gas in" dip tube inside the keg. (Tubing not included). You set your desired pressure on the regulator and gas gets emitted through the .5 micron stainless stone. The half micron bubbles rise through the beer creating so much surface area contact between gas and liquid that the absorption rate is very rapid. This is very similiar to how beer is carbonated in breweries. You can also use this stone with an oxygen source to oxygenate the wort pre-fermentation. Use 6-8 PSI or until you can see bubbles for wort aeration.
Sanitizing your Diffusion Stone: To properly prepare your stone for use, we recommend you boil in water for 3-5 minutes. By heating the stone to boiling temperatures you kill all possible contaminants that may be hidden within the stones micro pores. Using a surface sanitizer is not a guarantee from contamination. Boiling also greatly reduces clogging issues by helping to remove sugar residue. The new and improved diffusion stone now has threads allowing brewers and winemakers to easily unscrew the stone for sanitation. If boiling is not an option, for whatever reason, we recommend the next best, soaking in Star San. Star San will remove a majority of surface contamination/bacteria, but will not sanitize the interior of the stone which may or may not be contaminated.
Please note that you do not want to touch the stainless stone portion with your hands. The oils on your fingers an actually clog the small pores in the stone.