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Old 06-15-2008, 05:21 PM   #1
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Default Explosive fermentation

What causes it? id say a sold 50% of my beers blow their top..... its not a big deal as long as you look! but its annoying and messy, how do i stop this? is that why people make starters?

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Old 06-15-2008, 06:14 PM   #2
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Starters still result in vigorous fermentation, depending on the yeast type. A blowoff tube will prevent blowing the top and the mess that follows.

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Old 06-15-2008, 06:32 PM   #3
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You didn't mention the size of your fermenters so I'll take a stab at it...a 5 gal carboy does not make a good primary. You need at least 6.5 gals.

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Old 06-15-2008, 07:11 PM   #4
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i have only 6.5 gallons carboys. and Ive never made a starter, never saw the need..... and I have a blowoff tube for if (when) they blow... just kinda wierd! do other peoples beers not explode a lot?

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Old 06-15-2008, 07:28 PM   #5
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i have only 6.5 gallons carboys. and Ive never made a starter, never saw the need..... and I have a blowoff tube for if (when) they blow... just kinda wierd! do other peoples beers not explode a lot?
I have this Blue Moon clone that will have very vigorous fermentations whereas wheats and stouts don't. I made a Kolsch last month and it went crazy.
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Old 06-15-2008, 07:39 PM   #6
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I ferment at 65° in 6 gallon better bottles...I've never had any krausen getting into the airlock, and I've never needed a blow-off tube. Maybe I'm just lucky, or maybe the carefully controlled temperature keeps things under control.

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Old 06-15-2008, 07:49 PM   #7
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i have only 6.5 gallons carboys. and Ive never made a starter, never saw the need..... and I have a blowoff tube for if (when) they blow... just kinda wierd! do other peoples beers not explode a lot?
I just got done cleaning up a slight mess. I brew 8 gallons in a wine tun that holds about 9.5 to 10 gal. I have a blowoff hose made from the bottom part of a 3 piece with the little X clipped off the bottom. This is the first time it's popped the top using a blowoff tube. I brewed a stout using S-04 dry yeast but just 1 pkg. Every fermentation just seems to be a little different. Well anyway, thanks to the people on this forum, I knew just what to do. Clean and sanitize everything and not panic. I'm just a little leary of leaving this bad boy alone! But I think he'll be good now.
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Old 06-15-2008, 07:54 PM   #8
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I have this Blue Moon clone that will have very vigorous fermentations whereas wheats and stouts don't. I made a Kolsch last month and it went crazy.
funy, ive noticed that the stouts seem much more likely to blow...
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Old 06-15-2008, 07:55 PM   #9
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I ferment at 65° in 6 gallon better bottles...I've never had any krausen getting into the airlock, and I've never needed a blow-off tube. Maybe I'm just lucky, or maybe the carefully controlled temperature keeps things under control.

crap i was just at home depot and was gonna get a thermometer, to see how cold is was in my basement (im thinking its about 65.... but im not sure)
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Old 06-15-2008, 07:56 PM   #10
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I ferment at 65° in 6 gallon better bottles...I've never had any krausen getting into the airlock, and I've never needed a blow-off tube. Maybe I'm just lucky, or maybe the carefully controlled temperature keeps things under control.
Never say never. It's a sure fire way of guaranteeing that you will get one.
Like I've never broken a carboy (until last week), and I've never had a blow off in a 6.5g carboy (until a couple of months ago, when I got two back to back). I also always get 85% efficiency, until today, when it suddenly dropped to 72%. Time to check the refractometer and thermometer.

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