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Forgot to take hydrometer reading

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JStax
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beers 3820 º places 238 º 06:29 Sun 10/28/2012

Brewed an IPA last night and forgot to take a hydrometer reading at the end. I took one this morning, about 11 hours later and the reading is a little lower than what Hopville predicted it would have been. Does anybody have any sort of idea the amount of fermentation that would have occurred in this short a time. The projected reading was 1.074. My actual reading now is 1.061.

 
fiulijn
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beers 16462 º places 680 º 06:45 Sun 10/28/2012

Iím not an experienced homebrewer, but if the fermentation started, the wort is now partially carbonated, and that factor as well changes the SG; so I would not even be sure that 1.061 is correct...

 
joeneugs
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beers 4305 º places 188 º 07:36 Sun 10/28/2012



Haha, yeah Iíd dump the batch and start over.

Seriously though, donít worry about it. My gut says that it would be hard for a beer to drop 13 gravity points in just 11 hours, but itís definitely possible. Especially if you pitched a large healthy starter. Also warmer temps would kick start fermentation quicker. A lot of factors can influence the pace of fermentation so thereís really no way of knowing for sure. The bottom line is, not knowing the OG of the beer will not effect the quality of the brew.


Originally posted by HornyDevil
Youíre fucked.

 
jsled
beers 28 º 07:42 Sun 10/28/2012

Call it 1.065 and donít worry about it too much :) You were probably lower than the estimate to begin with.

At this point, the yeast are mostly reproducing, not really actively fermenting. To fiulijnís point, theyíll consume some sugar to do this, but theyíre not releasing a lot of CO2 just yet. Carbonation doesít change the gravity so much as nucleation sites on the hydrometer itself might cause bubbles which will artificially float the hydrometer. In any case, you should learn/expect to degas samples you take post-pitch.

 
JStax
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beers 3820 º places 238 º 07:43 Sun 10/28/2012

Originally posted by joeneugs


Haha, yeah Iíd dump the batch and start over.

Seriously though, donít worry about it. My gut says that it would be hard for a beer to drop 13 gravity points in just 11 hours, but itís definitely possible. Especially if you pitched a large healthy starter. Also warmer temps would kick start fermentation quicker. A lot of factors can influence the pace of fermentation so thereís really no way of knowing for sure. The bottom line is, not knowing the OG of the beer will not effect the quality of the brew.


Originally posted by HornyDevil
Youíre fucked.



Thanks for the info, everyone.

 
keanex
beers 1629 º places 63 º 08:29 Sun 10/28/2012

You could do reverse readings by taking the yeast attenuation % and doing some quick math. I believe you could just multiply the FG by the attenuation % and it will give you a rough OG.

 
Christian
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beers 11804 º places 240 º 14:13 Sun 10/28/2012

Say that it is whatever you expected it to be and donít worry. Nobody will try to prove you wrong

 
fiulijn
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beers 16462 º places 680 º 14:29 Sun 10/28/2012

Originally posted by Christian
Say that it is whatever you expected it to be and donít worry. Nobody will try to prove you wrong

Unless you live in Ontario: I just learned that every imported beer has to be analyzed in a lab and ABV recalculated

 
JoeMcPhee
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beers 9004 º places 529 º 15:19 Sun 10/28/2012

Originally posted by fiulijn
Originally posted by Christian
Say that it is whatever you expected it to be and donít worry. Nobody will try to prove you wrong

Unless you live in Ontario: I just learned that every imported beer has to be analyzed in a lab and ABV recalculated

Yup - welcome to bureaucracy-land.

 
BigBeer45
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beers 1335 º places 15 º 15:44 Sun 10/28/2012

Originally posted by JoeMcPhee
Originally posted by fiulijn
Originally posted by Christian
Say that it is whatever you expected it to be and donít worry. Nobody will try to prove you wrong

Unless you live in Ontario: I just learned that every imported beer has to be analyzed in a lab and ABV recalculated

Yup - welcome to bureaucracy-land.



Is Ontario is checking a bottle of every imported beer to verify and recalculate the ABV?

 
Rosebud butternuts
beers 2396 º places 37 º 16:56 Sun 10/28/2012

you should just give up brewing if you forgot to do a reading. My best beer that I ever made is one that I forgot to do an OG on.

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