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Old 04-18-2008, 10:25 PM   #1
ethangray19
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I will be racking and bottling my irish red today and racking a new beer right on top of the yeast cake.

This is my first time doing this.

The irish red has been in the fermentor for 2.5 weeks; should I worry that the yeast will do its job on the new beer???


Also, there is some krausen residue near the top of the fermentor, should I juat let that be and then when I aerate my new beer get it mixed up in the mix???


Thanks to anyone with advice.
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Old 04-18-2008, 10:34 PM   #2
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leave it be, it'll work fine. i've done it a few times. be ready with a blow-off tube...there are a LOT of yeast in there and you'll get a crazy fermentation.
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Old 04-18-2008, 10:54 PM   #3
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Yeah, you actually have more yeast in there than you need. You could pull out a cup of yeast cake/slurry, then pour the new wort in.

you'll get explosive fermentation within hours. a blow off hose will be necessary.

and make 100% sure your wort is at uniform pitching temperature so you don't stress (or cook) the yeast.
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Old 04-18-2008, 10:56 PM   #4
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Those little guys are going to beat the $hit out of your poor wort!

Pitching onto a yeast cake is the way to go.

 
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Old 04-18-2008, 10:59 PM   #5
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Only thing I would worry is if the previous batch of beer is different from your new batch of beer. But if you doing the exact same recipe, then it should be fine.

 
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Old 04-18-2008, 11:50 PM   #6
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Quote:
be ready with a blow-off tube
+1 Also, based on my recent experience, be prepared to lose a fair amount of wort -- as in the photos below.




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Old 04-18-2008, 11:59 PM   #7
rod
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when i pitch on a yeast cake i split my wort between 2 - 5 gallon fermenters to have lots of head space.
i hate losing beer to blow offs!
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Old 04-19-2008, 12:04 AM   #8
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Woohoo, I get to self-promote again! +1 on the blow-off dude!

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Old 04-19-2008, 12:18 AM   #9
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Unless properly planned you're going to overpitch... I'm still working out the proportions but I think tripling the original gravity of the last batch is a good place to start. Don't worry regardless, it will still be great beer!

 
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Old 04-19-2008, 04:39 AM   #10
ethangray19
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thanks for all the replies and advice!!
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