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Old 01-01-2013, 04:51 AM   #1
onthedot
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Default Gravity of starter after fermentation

What is the target gravity that a starter should be after fermentation? Assuming the OG is 1.030-1.040


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Old 01-01-2013, 05:57 AM   #2
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Sure most brewers do not measure it and it would vary according to the yeast used. Are you looking at pitching the yeast into a brew or just harvesting the yeast and storing for later use?


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Old 01-01-2013, 06:06 AM   #3
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I am pitching the yeast into a brew. It's been 3 days on a stir plate and my gravity is 1.015, I just wanted to make sure it was completely fermented before I took it off of the stir plate.

Used light DME and Wyeast 1056
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Old 01-01-2013, 08:18 PM   #4
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You don't need to wait for complete fermentation to pitch a starter. In fact, it's normal a good idea not to wait that long.

In a starter you want to grow healthy cells, don't worry about fermenting the wort. Most of the cells are actually generated within the first 24-48 hours. This is the end of the exponential growth phase. When the gravity is about half of the starting gravity nearly all of the cells have been produced.

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http://woodlandbrew.blogspot.com/201...ervations.html
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Old 01-02-2013, 01:05 AM   #5
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I made a 1.044 starter wort with 1056 Sunday and when I stepped it up tonight, the spent wort read at 1.010-12.
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Old 01-02-2013, 01:17 AM   #6
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If your house is +65 then it's done.
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Old 01-02-2013, 02:13 AM   #7
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An OG of 1.040 with 75% attenuation would leave you with a FG of 1.010. If your FG is 1.015 and you had 75% attenuation, your OG would have to have been 1.060. I would guess that the yeast hasn't fully attenuated after three days, but I wouldn't think that it would be very far off.


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