« on: November 21, 2011, 08:38:36 PM »
I had the good fortune to receive ONE experimental smack pack of fresh lager yeast. I'm going to pitch it to 6.5g of the Schwarzbier recipe in the AHA archives. My estimated OG is 1.054. Both Beersmith and Mr. Malty tell me I need ~490 billion cells for the pitch. However, Beersmith says I can achieve this with 1 yeast pack (all I have, all I'll get) in a 2.29qt. starter on a stir plate. Mr. Malty on the other hand tells me I need 2 yeast packs and a 3.44L starter.
I only have a 2000ml flask so my plan is to do two step starters (1.5 cups DME/2000ml each) assuming this will give me plenty of yeast for a good clean fermentation. Is this too much? Why won't Mr. Malty let me build the calculation from one package? I'm assuming it's because of the growth factor limitation of 3, and not taking into account multiple steps/starters. We know what can happen when we assume so any thoughts would be appreciated. Cheers.