Instead of diffusing pure oxygen into your wort this system uses filtered air. The included air-pump pushes air through an inline sanitary filter which is then dispensed into the wort through the two micron diffusion stone.

Aeration is beneficial because it supplies yeast cells with oxygen needed for reproduction. Aerate wort after it has been chilled and before yeast is pitched and fermentation has begun. Aerating wort while it is still hot can cause off-flavors in the finished beer as can aerating fermenting beer. The advantage of an aeration system is that you never have to buy replacement oxygen tanks. No assembly required.