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Old 04-08-2010, 11:41 PM   #1
dummkauf
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Default Cooler fermentation?

I have a hefeweizen in primary that I brewed on March 25 and pitched onto WLP320 yeast. OG = 1.057 (BeerSmith Estimated 1.056).

Fermentation temp according to the temp strip on the outside of the Carboy = 63 degrees. WhiteLabs recommends 65-69 degrees for the yeast.

I just took a gravity and it was only down to 1.028 today which would be 15 days in primary. (BeerSmith is predicting a FG of 1.015)

So is this just fermenting slower because it's 2 degrees cooler than the bottom end of the fermentation range, or has the colder temp possibly caused a stuck fermentation?

I'm going to wait a week and take another gravity reading, but was just curious what the more experienced brewers thoughts are on this.

Thank you in advance!

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Old 04-08-2010, 11:47 PM   #2
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since you don't have a second SG reading to compair ill have to go with slow fermentation.

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Old 04-08-2010, 11:47 PM   #3
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I highly doubt it's stuck. I've always questioned the accuracy of those fermometers anyways. Since you're using the low end of the fermentation scale for that yeast, it will take longer. I suspect it should be finished in a few days.

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Old 04-08-2010, 11:48 PM   #4
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It will have slowed your fermentation some, cooler temps have caused stalled fermentations for me in the past, but I think you are doing right by waiting a few more days and taking another SG reading.

If you still havent reached your target FG there are only a few reasons that may cause that.

1. low temps stalled/slowed fermentation
2. your thermo was off when you mashed
3. you have a large amount of unfermantables in your grainbill.

I'm leaning towards #1.

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Old 04-08-2010, 11:51 PM   #5
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Quote:
Originally Posted by Schnitzengiggle View Post
It will have slowed your fermentation some, cooler temps have caused stalled fermentations for me in the past, but I think you are doing right by waiting a few more days and taking another SG reading.

If you still havent reached your target FG there are only a few reasons that may cause that.

1. low temps stalled/slowed fermentation
2. your thermo was off when you mashed
3. you have a large amount of unfermantables in your grainbill.

I'm leaning towards #1.
Oh, and I forgot to mention, this is an extract brew. So I'm thinking #2 & #3 probably aren't the culprits...though maybe a bad bag of DME, guess I'll have to wait and see
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Old 04-08-2010, 11:55 PM   #6
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Quote:
Originally Posted by dummkauf View Post
Oh, and I forgot to mention, this is an extract brew. So I'm thinking #2 & #3 probably aren't the culprits...though maybe a bad bag of DME, guess I'll have to wait and see
actually 2 and 3 do apply. you just have no control over or knowledge of them because your extract (wort) was made by someone else.
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Old 04-09-2010, 01:12 AM   #7
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Also, since it's an extract recipe, I'd expect the FG to be around 1.020. Extract will usually finish a bit higher than predicted all-grain beers.

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Old 04-21-2010, 03:13 AM   #8
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Yep, as usual I needed to RDWHAHB. Just took a gravity reading and it's down to 1.015, exactly what BeerSmith predicted the final gravity to be Going to check it again in a few days and if it's steady, it's off to secondary for a couple of weeks to clear........FINALLY!!! I'm all out of Yoopers DFH 60 min clone and need my primary back to start another batch

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