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Old 07-09-2012, 11:09 PM   #1
IncredibleMulk
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Default AG and Blow Offs

Just finished my 4th AG batch that was not BIAB and have done close to 100 partial and extract batches. I don't always do starters...but let the estimated OG determine whether or not I do one. Interestingly...I had never had a blowoff until I started doing AG batches. All four of my last brews have had serious blowoffs without using starters...just curious...anyone else experience this or is it just my overly excited batches?

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Old 07-09-2012, 11:14 PM   #2
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Each batch is different... I haven't had a single blowoff yet, AG or extract, liquid yeast with starter or dry yeast. Sounds like whatever you have been doing to your AG beers gets your yeast in party mode!

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Old 07-09-2012, 11:20 PM   #3
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Any beer that has anything more than a pinch of wheat in the recipe seems to consistently cause a blow-off for me. As you may suspect, the dunkelweizen I am currently fermenting is trying to creep its way out of the fermenter.

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Old 07-09-2012, 11:25 PM   #4
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I frequently have blow offs. Always all grain and starters probably 90% of the time. Some yeast is more aggressive than others. If you are using a carboy that has lots of head space you can avoid a lot of blowoffs. Unfortunately I prefer the plastic carboys which aren't made in sizes over 6 gallons. So putting about 5.25 gallons into one of those doesn't leave a lot of room for aggressive fermentation.

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Old 07-10-2012, 01:52 AM   #5
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I require a blowoff tube about 80-90% of the time. If I do a starter it's nearly guaranteed to go over. I'm in the same boat with the 6 gallon plastic carboys.

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Old 07-10-2012, 03:02 AM   #6
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I have always used starters but didn't get blowoffs until I started aerating with O2. Now it happens every batch.

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Old 07-10-2012, 03:03 AM   #7
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I use to have about a 50% blowoff rate when I was doing extracts. Since switching to AG, I haven't had one. I always use a blowoff tube just in case too. I'm guessing I'm doing something wrong to not get them. If I decide to just use an airlock on my next batch, it'll probably blow the lid right off the bucket.

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Old 07-10-2012, 03:27 AM   #8
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I just use one every time

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Old 07-10-2012, 04:45 AM   #9
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Quote:
Originally Posted by enkamania View Post
I just use one every time
That's always been my insurance policy, blow-off tube every time.
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Old 07-10-2012, 05:51 AM   #10
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Something else that's interesting with this batch in particular is that I split it into two different fermenters and pitched the exact same yeast strain (US-05). One blew off with a vengeance and the other was a very peaceful and easy ferm...crazy!

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