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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Carboy Size Time and Oxygen
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Old 08-14-2008, 05:33 AM   #1
memphomaniac
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Default Carboy Size Time and Oxygen

I'm about to begin brewing my first batch at some point in the next couple weeks and have a question about my 6 gal Better-Bottle. My LHBS suggested I get the 6 gal to use as a primary fermenter to avoid using a blow-off tube. I'm planning to go from the primary to a keg. I want to be patient and leave it in the primary for a while, as some of you have suggested. I'm wondering though, if I leave a batch in the primary over an extended period, say a month, is there danger of oxygen damage after the fermentation has stopped with all that head space?

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Old 08-14-2008, 05:35 AM   #2
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None at all. Whatever O2 isn't consumed by the yeast will be blown out of the carboy by all the CO2 that gets produced. You are golden.

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Old 08-14-2008, 05:43 AM   #3
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You won't have any problems but I would get a blow off tube just in case. I use one for each batch.

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Old 08-14-2008, 06:04 AM   #4
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Much obliged for the responses. One follow-up if I may. So removing the airlock and taking hydrometer readings won't reintroduce enough air to be concerned about?

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Old 08-14-2008, 06:23 AM   #5
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Nope. Racking is the step you need to be careful about.

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Old 08-14-2008, 02:57 PM   #6
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I'll second using a blow-off as well. I use a 6gal carboy and some of my latest fermentations have been so vigorous that I needed to use a blowoff tube for multiple days.

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Old 08-14-2008, 03:01 PM   #7
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^^^^
Thirded. Headspace does not prevent blowouts. I've blown many a pint of foam out the top of a 6.5 gallon carboy.

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