Yeast starter offset for vital stats consideration

Discussion in 'Feature Requests' started by Flysparge, Mar 10, 2020.

  1. Flysparge

    Flysparge New Member

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    If this has not been covered before..apologies.
    Have been known to use a yeast starter and use at high krausen and try to manually adjust the addition.
    Would be nice to have in the recipe calculator the yeast starter volume(eg 2 litres), SG (eg 1040), assumed SRM (eg 8), and IBU (=0) to enable a final pre starting ferment of the main wort.
    Just a thought. Cheers.
     
  2. Nosybear

    Nosybear Well-Known Member

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    Sorry, if there's a question in there, I'm not getting it.
     
  3. BarbarianBrewer

    BarbarianBrewer Active Member

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    I agree. It would be nice to see on the recipe page what size starter you plan to use. The yeast starter calculator is great. But it would be nice to see that info on the recipe screen. My starter size varies depending on the OG of the recipe, the age and apparent quality of the yeast and whether I'm pitching from a smack-pack or slurry. Volume, SG and number of build-up steps would be useful. I don't see SRM or IBU being useful for a starter.
     
  4. Mark Farrall

    Mark Farrall Well-Known Member

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    Is ths to account for the extra volume and gravity change of pouring in the whole starter?
     
  5. Pricelessbrewing

    Pricelessbrewing QA Software Tester
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    This is my assumption based on the 1st post.

    If so, I believe this should be accounted for when/if my proposed changes to boil volumes and the quick water requirements are implemented. I'm tagging this thread in the dev request and will follow up when it's available for testing, and again when it goes live.
     
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  6. Nosybear

    Nosybear Well-Known Member

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    That complicates it: I always decant my starters. I don't worry about the dilution but it's easy enough to calculate.
     
  7. Flysparge

    Flysparge New Member

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    Sorry guys, yes to account for an offset of the lower gravity volume starter, zero bitterness and and different colour. eg, if I was pitching a 2 litre starter at high krausen on purpose I know I can adjust the SG using an example of a 22 litre batch SG=((1.065*22)+(1.040*2))/24. I was suggesting as a feature to have this in build to improve the usability, also to adjust colour and IBU in the final statstics. It was just a suggestion. Sometimes I don't decant, sometimes I do.
     
  8. Nosybear

    Nosybear Well-Known Member

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    Add the volumes, the alcohol volumes (ABV*volume, you can estimate for the starter), divide the sum of the alcohol volumes by the total volume. Decant (likely a good idea because the starter was not created under optimum conditions to make beer) and the volume is so trivial it can be ignored. There are so many possible scenarios when it comes to starters or for that matter, yeast (you're adding volume there, too), that the solution would be fairly complicated.
     
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  9. Grey Cat Brewing

    Grey Cat Brewing New Member

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    I decant almost all of the time and the potential changes to the beer are negligible in my experience. Also, I keep track of the starter I use on the Brew Session (the first entry always!) and I even adjust starter size based on estimated viability of the yeast I am using.
     
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  10. Group W

    Group W Well-Known Member

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    I always decant as well. I want as little of that nasty starter beer as possible going in my precious brew.
     
    BarbarianBrewer likes this.

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