« on: October 13, 2015, 07:48:23 PM »
Mark (S. cerevisiae) - I typically brew batches around 1.070 - 80 with WLP001. For the most part, 001 is saved from batch to batch without washing. My method being a dose of spring water, swirl like mad, and fill-up with trub-and-all, two Star-San sanitized 1/2 gallon mason jars. A few days before brew day, I take a large slurry, perhaps a cup, and start it up again with a 3 liter stirred starter.
I brew 4-5 batches a year, and this process has thus far worked well. The yeast is by all means, not fresh, but the stirred starter generally produces a nice visible layer of new creamy yeast. I have no means of measuring yeast viability or growth of the starter batch; however, every batch following this methodology has worked out well and produced the beer I enjoy consuming.
I will to try your process for an upcoming batch and would appreciate your advice in approximating the correct amount of yeast slurry and starter size for a 1.070 - 80 batch. Considering the slurry is 4 months old or older, and saved from batch to batch, where should I start? Approximately how much slurry and what starter size?
Also, my next batch will be a Heady Topper recipe with a new package of Vermont IPA Yeast (GY054). Using your process, what size shaken starter do you suggest?