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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > 2 stage fermentation
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Old 09-08-2011, 06:04 AM   #1
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Default 2 stage fermentation

Does this mean I'm pitching a starter halfway through? Would say a 2 liter starter instead of 1 do the same? Or does this refer to a secondary fermentor? Sorry if this is a silly question I'm planning brewing NB's imperial stout kit and wondering if this means I have to buy a 5 gallon carboy.

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Old 09-08-2011, 06:08 AM   #2
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What is the exact wording they use? Is it secondary fermentation?

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Old 09-08-2011, 06:42 AM   #3
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Reading the instructions it says " rack into a secondary for 2-3 months. " can I not secondary? I'm not opposed to it I just haven't done it yet.

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Old 09-08-2011, 07:07 AM   #4
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"rack into secondary for 2-3 months" doesn't involve pitching of yeast. You pitch the yeast right after cooling the wort, and that's it for messing around with yeast. You don't have to rack to secondary, necessarily, but if you are going to let it sit for several months you may want to either rack to a secondary fermenter to get it off the yeast cake/trub, or simply bottle it and age it in bottles.

Edit: In case you don't know, racking to secondary simply means transferring the beer to a new fermenter/carboy to get it off the yeast cake/trub.

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Old 09-08-2011, 11:29 PM   #5
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I understand racking into a secondary I guess I was confused by the wording "2 stage fermentation " and I want to know how long I can leave a big beer on the yeast cake without any adverse effects.

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Old 09-08-2011, 11:45 PM   #6
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Quote:
Originally Posted by Mdessert View Post
I understand racking into a secondary I guess I was confused by the wording "2 stage fermentation " and I want to know how long I can leave a big beer on the yeast cake without any adverse effects.
No fermentation happens in the secondary unless you transfer too early. Best to wait until ferment is done. I would say a month on a big beer is sufficient before transferring, but best to take a hydrometer reading. If you get a consistent hydrometer reading over the course of 3-5 days then it is ready for secondary (if that is your plan).
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Old 09-09-2011, 01:38 AM   #7
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Don't mean to be a pain but I understand primary fermentation. I'm really new to brewing I have done 4 and 1/2 extract kits. I've never done a " big beer " just trying to figure out if I need to buy a 5 gal carboy and do my first secondary to age this beer or if I would have the same results leaving it in the primary for 2ish months.

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Old 09-09-2011, 01:56 AM   #8
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You can leave it in the primary. I routinely leave brews in the primary for extended periods such as 6-8 weeks.

The only downfall is that you tie up a fermenter for that long... Buy another fermenter and you are. goood.

Brew more...

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Old 09-09-2011, 03:03 AM   #9
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If I feel comfortable with a 3-5 week fermentation then I will leave it in the primary for those 3-5 weeks then goto bottles. If it's going to be longer than that, I rack to a secondary. My secondary fermenters are glass (less oxygen permeable than plastic) + it's not a bad idea to be getting the beer off the yeast cake by that time...

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Old 09-09-2011, 04:11 AM   #10
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If you don't want to purchase a carboy for aging bigger beers, I'd suggest bottling it instead of letting it sit on the yeast cake for months. I wouldn't have any issue letting it sit in primary for 3 weeks or so, even 4 weeks, but I can't see any benefit to allowing it to sit on the trub long than necessary. If you are going to age the beer, it could easily age in the bottles.

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