Keep your yeast healthy and vigorous by aerating the wort before you pitch.
Use this 2 Micron Diffusion Stone with an aeration pump to aerate your wort prior to pitching yeast. This 2 Micron stone is attached to a 26" long stainless tube. The 2 micron size works perfectly with aeration pumps. Attach 3/8" ID tubing (D1706). If you’re looking for the same product with a .5 micron stone see KEG595.
I have been using a diffusion stone for probably 10 years and the other day, when I started a batch, my old diffusion stone came apart. I was devastated. I got this uneasy feeling that after all of the hard work of preparing the brew that it couldn't possibly create a decent beer. I immediately ordered a new stone to restore sanity to my fermenting process. I have always had very active fermentations and have attributed much of that to the use of the diffusion stone for 30 seconds of pure oxygen into the finished wort. I don't think that I will ever be without some sort of diffusion stone to aerate my wort for active fermentation with healthy yeast. Thanks MoreBeer for having the products that make us all feel more comfortable brewing.
Since purchasing this and using with pure O2, my beers have improved dramatically. I always have quick starts and lower finishing gravities than I had before. Huge improvement over shacking the carboy.