Author Topic: Yeast water hydratation is Top Up?  (Read 609 times)

Offline pedrovic

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Yeast water hydratation is Top Up?
« on: August 23, 2021, 11:04:36 AM »
Hello, I have a doubt: When I hydrate the yeast according to Beersmith, should I consider the water used (in this case 150ml) as "top up" in the configuration of the equipment?
Thank you!

Offline Oginme

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Re: Yeast water hydratation is Top Up?
« Reply #1 on: August 23, 2021, 11:25:57 AM »
It is up to you.  For most of my brewing measurements, the 150 ml falls just about at the edge of my accuracy in volume measurement.  As such for the few times I use dry yeast, I don't bother to add the 100 ml to 150 ml of water I use for rehydration.  If you want to be absolutely accurate, you can add that as top off water to fermenter.  Your choice, there is no wrong answer here.

If you look at it practically, 150 ml in a 10 liter batch (my standard batch) is only about 1.5% drop in starting gravity. This does not even change the measurement with my hydrometer.  If I had one of the newer digital hydrometers, I would probably factor that drop in, as it would become measurable in my process.
« Last Edit: August 23, 2021, 11:29:02 AM by Oginme »
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Offline GigaFemto

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Re: Yeast water hydratation is Top Up?
« Reply #2 on: August 23, 2021, 12:22:06 PM »
You could also call it a yeast starter and check the "Add starter to bottling vol" box. Then BeerSmith knows that this added volume is not part of the batch volume, but is added to the fermenter after the batch volume has been measured. It really doesn't figure in any calculations then except for the Est Bottling Vol.


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Offline pedrovic

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Re: Yeast water hydratation is Top Up?
« Reply #3 on: August 24, 2021, 06:09:51 AM »
I find this box in "Vols" tab.

It show the starter volume in final batch.
Thank you all for help  :)

Offline Kevin58

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Re: Yeast water hydratation is Top Up?
« Reply #4 on: August 24, 2021, 06:21:40 AM »
I assume you are using dry yeast? Hydrating dry yeast really isn't necessary.
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