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Old 08-19-2012, 03:56 AM   #1
WiscoMan
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Default 3 gallon batch in 5+ gallon fermentors

I am looking to brew a scaled down batch and all I have are large buckets/carboy that I use for full sized batches.

Will I still be able to ferment in my current equipment without worrying about all the extra head space?

I plan to brew a 2.5 - 3 gallon batch and use 5 gallon equipment.

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Old 08-19-2012, 06:37 AM   #2
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I use a 6.5 gallon fermenter for a 5 gallon batch. And... I aerate with pure oxygen before pitching, so plenty of oxygen in the space. I wouldn't be afraid to try it.

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Old 08-19-2012, 11:49 AM   #3
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No problems doing 3 gallons in a 5 gallon.

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Old 08-19-2012, 12:17 PM   #4
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I have a 6 gallon carboy that I do 3 gallon batches in all the time with no oxidation problems.

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Old 08-19-2012, 04:45 PM   #5
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Sounds great. Thanks for the responses. I may try to go even smaller with the batch size and pick up some water jugs from Meijer or Walmart. Has anyone tried fermenting in a 2 or 3 gallon water jug bought from the store? I know that you need the good PET plastic like #1

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Old 08-22-2012, 05:05 AM   #6
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I, too, recently wanted to do smaller batches. My last two have been 3.5 gallons into the 6.5 carboy. I figured to primary in it shouldn't be a problem, due to any oxygen in the headspace will be replaced by Co2 from fermentation. So far all turned out great. =)

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Old 08-22-2012, 11:54 AM   #7
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I do 3 gal batches all the time in an 8 gal fermenter. I've never had a problem. That head space probably fills with CO2 which acts as a barrier. That's the way I see it.

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Old 08-22-2012, 11:58 AM   #8
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Should be no problem - the only danger might be for a really long secondary. Assuming it's a normal beer you should be great. I do small beers all the time with leftover runnings. I often end up with 2.5-3 gallons of extra wort. I ferm them in whatever I have handy - which is usually between 5 and 6.5 gallons.

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