Dissolve high levels of O2 in your wort! Oxygenation with compressed O2 and a diffusion stone gives a high level of dissolved O2 much faster and more effectively than aeration with an aquarium-style pump. Dissolved O2 in your wort means healthier yeast, shorter lag phase, faster fermentation, lower levels of fermentation byproducts like esters and diacetyl, and lower terminal gravity. Needed but not included is a disposable oxygen tank, available at hardware stores.