We removed it, because it was inaccurate. It should not be showing up in the second step, and we'll fix that. Sorry for your trouble.
The reason is because the results don’t change- no matter what you do. A step up? Same results. A bigger starter? Same results. Smaller starter- same results. There is something fundamentally wrong with the calculation, and so we removed it from our list of choices until it is corrected.
That was not my experience, so it must have been something new. I never changed the gravity, so that was no issue. But if I changed the size of the starter (in liters) using the stirplate equation, I would always get appropriate results. I could adjust the size and use steps to achieve the cell count I wanted without issue. I’m surprised to see it go away so quickly.
Any updates on this? I used the Braukaiser calculator and underpitched my beer. That’s DIPA wasted now. Please fix the Chris White stir plate equation.
Braukaisers the more accurate equation and is within a margin of error of known max yeast cell densities for propagation, which is what most yeast companies use.
Whites formulas however, while well served and was the best available at the time, are based on research that as far as I'm aware was never published publicly and doesn't always give realistic results.
Neither are perfect, as different strains have different growth rates and max cell densities. But I recommend braukaisers formula, or a volume based starter like Omega yeast recommends.
That was my point. There are lots of calculators, none of which work well. So pitch rate is kind of like back pain: Find the placebo that works and keep using it. If you aren't doing cell counts, viability checks, and measuring your slurry accurately, you're pitch is not accurate. The calculator on the site works for me and for me, that's all that matters.Omega Yeast's research essentially says that all cell count calculators are lying to you, as each strain reproduces its cells very differently. Omega recommends biomass as their technique for pitching rates and prop very dissimilar to Wyeast and White Labs. That research is hopefully going to be released soon.
Omega Yeast's research essentially says that all cell count calculators are lying to you, as each strain reproduces its cells very differently. Omega recommends biomass as their technique for pitching rates and prop very dissimilar to Wyeast and White Labs. That research is hopefully going to be released soon.
https://brewstock.com/wp-content/uploads/2019/03/Omega-Yeast-presentation.pdf ... page 23Biomass will absolutely be the more accurate process. Man I should have asked lance, adi, or laura about that at kveik fest when I had almost all of omega in front of me...