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Yeast Starter - Viability Percentage Not Working

dongordon

Apprentice
Joined
Mar 11, 2010
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In the Yeast Starter tab for a given recipe, the Yeast Viability calculator/estimator does not seem to be working.  For a yeast with a manufacturing date of 5.17.11, it says the viability is 96%.  On the Yeast Starter Tool the viability is calculated at 76.44%.  Mr Malty also calculates the viability as 76% for the same date.

Would you please fix the viability calculation in the Yeast Starter tab for a given recipe?  I want to make sure it calculates the correct size starter needed.  Thanks!
 

Hopfrog

Brewer
Joined
Jun 13, 2011
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Check your brew date on the recipe design tab, the viability calculator takes this date into account as well.
 

dongordon

Apprentice
Joined
Mar 11, 2010
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Hopfrog - you are a genius.  I had the brew date set to 1/1/2011, what I do before I actually brew - I keep a record of recipes and batches, the later gets the really brew date.  Once I set the brew date to today, the Yeast Viability calculation works correctly.

Thanks !!!!!  :)
 
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