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Old 09-09-2010, 06:26 PM   #1
chriscraig
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Default How to fix an under-carbonated beer

I recently opened up a couple bottles of my latest beer, and I notice that they're quite under-carbonated. Not flat, but definitely under-carbonated.

The beer (from a pre-hopped kit) has been in the bottle for 3 weeks, and that's normally enough time.

Can I fix this batch by opening all the bottles, adding some carb drops and recapping?

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Old 09-09-2010, 06:38 PM   #2
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Was it a high-gravity beer?

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Old 09-09-2010, 06:50 PM   #3
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No. 1.040.

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Old 09-09-2010, 06:52 PM   #4
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is it a coopers pre-hopped kit?

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Old 09-09-2010, 06:59 PM   #5
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Muntons...same thing.

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Old 09-09-2010, 07:50 PM   #6
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Before just adding more sugar, do you know what went wrong? How did you prime before, and what was the temperature where the bottles were stored?

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Old 09-09-2010, 08:05 PM   #7
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3 weeks at 70+ degrees F is a standard minimum for expecting an average beer to be carbed. Some will just take longer for no reason. If you were at a cooler temp, then you can expect them to take longer as well.

Keep 'em warm and give them more time before even THINKING about doing anything to them yet.

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Old 09-09-2010, 08:16 PM   #8
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And don't drop carb tabs into a bottle with little carbonation unless they are cold. I'm in the process of fixing undercarbed beer now and it make one hell of a mess unless the bottles are cold.

Check your caps to see if they are on tight. If you can twist them a bit, the CO2 can leak out

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Old 09-09-2010, 09:19 PM   #9
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+1 to the cats comments. I would suggest simpky giving them a little more time at a slightly warmed temp (70ish). Dont shake them but turning them upside down amd then rightside up, just to get the yeast back into suspension sems to help a little as well.

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Old 09-09-2010, 11:28 PM   #10
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Thanks for the responses guys. I used 3/4 cup of corn sugar in the bottling bucket to prime.

1. I'm using Grolsch flip-top bottles that I've used before with no problem.
2. I've let the bottles sit at between 70 and 75ºF for 3 weeks now.

I'll wait another week before I try another one, then I should chill them before adding the carb drops?

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