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Repitching Amount

Discussion in 'Fermentation & Yeast' started by Paloaf, Jun 13, 2013.

 

  1. #1
    Paloaf

    Well-Known Member

    Posted Jun 13, 2013
    Here is a picture of some yeast I pulled from primary about a week ago. I rinsed the yeast once and then decanted it into two large flasks. After those two flasks settled, I poured that yeast into a smaller flask to measure it. I'm going to be brewing a 1.050 Pale Ale soon and was wondering how much viable yeast I may have here.

    I know I'll need about 180 Million cells for my pitch which works out to about 90 ML of slurry using yeast calculators. Is my yeast too dense after rinsing it a few times?

    yeast.jpg
     
  2. #2
    el_caro

    Well-Known Member

    Posted Jun 14, 2013
    No it is not too dense at all. I think you could safely assume 3bn cells per ml of yeast solid.
    You need to use a calculator like YeastCalc to tell you how many viable cells you have at the time you actually use it. The viability obviously is dropping as time elapses.

    Were it mine, I would be splitting the sample into 2 or 3 and making a starter with one sample about 3 days before I brewed.

    If you did not want to make a starter and were brewing in the next week or so then my guess is you will have around the 180bn viable cells you need for your planned Pale Ale.
     
  3. #3
    jack_a_roe

    Well-Known Member

    Posted Jun 14, 2013
    This is the question that has been keeping me from washing and reusing my yeast.
     
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