Membership questions? Log in issues? Email info@brewersassociation.org

Author Topic: Is my fermentation stalling?  (Read 4319 times)

Offline darkmorford

  • Cellarman
  • **
  • Posts: 69
  • Redmond, WA
Is my fermentation stalling?
« on: April 13, 2011, 11:41:38 am »
I just brewed my first batch on Sunday: Midwest Supplies' Raspberry Wheat extract kit with White Labs WLP300 yeast. While the brew process itself went well enough—at least, as far as I can tell being a first-timer—the coolest place I could find in my apartment still hovers around 70–72 degrees, which is a bit warmer than these yeast like, as I understand it. I'm using a 6.5-gallon plastic bucket as a fermenter with a 3-piece airlock.

Now, just three days after brewing, the airlock is bubbling only 2-4 times a second. Is this a sign of a stuck/sticking fermentation? Should I re-pitch?

Offline Bret

  • Assistant Brewer
  • ***
  • Posts: 210
Re: Is my fermentation stalling?
« Reply #1 on: April 13, 2011, 11:44:30 am »
Be patient, it sounds like it's doing fine.
Member #: 900000767

Offline Hokerer

  • I spend way too much time on the AHA forum
  • ********
  • Posts: 2654
  • Manassas, VA
Re: Is my fermentation stalling?
« Reply #2 on: April 13, 2011, 11:53:31 am »
Yep, for a wheat fermenting that warm the vigorous part of fermentation could be complete (not stalled).  But give it plenty more time to finish up.
Joe

Offline denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 27133
  • Noti OR [1991.4, 287.6deg] AR
    • Dennybrew
Re: Is my fermentation stalling?
« Reply #3 on: April 13, 2011, 12:11:06 pm »
As you say, 72-74 is pretty warm, and fermentation creates more heat.  Your temps could easily be in the upper 70s.  That makes the fermentation go quickly.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline tschmidlin

  • I must live here
  • **********
  • Posts: 8198
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #4 on: April 13, 2011, 12:47:28 pm »
Do you have a hydrometer?  Check your gravity.  What was your OG?
Tom Schmidlin

Offline euge

  • I must live here
  • **********
  • Posts: 8017
  • Ego ceruisam ad bibere cervisiam
Re: Is my fermentation stalling?
« Reply #5 on: April 13, 2011, 01:00:23 pm »
I just brewed my first batch on Sunday: Midwest Supplies' Raspberry Wheat extract kit with White Labs WLP300 yeast. While the brew process itself went well enough—at least, as far as I can tell being a first-timer—the coolest place I could find in my apartment still hovers around 70–72 degrees, which is a bit warmer than these yeast like, as I understand it. I'm using a 6.5-gallon plastic bucket as a fermenter with a 3-piece airlock.

Now, just three days after brewing, the airlock is bubbling only 2-4 times a second. Is this a sign of a stuck/sticking fermentation? Should I re-pitch?

Primary attenuative phase is probably already done due to the warm temps. Too late now. Next time place the fermenter in a tub of water and swap frozen water bottles out to keep it cool.

You'll probably see some off flavors if the actual (internal) fermentation temp turns out closer to 80F.
The first principle is that you must not fool yourself, and you are the easiest person to fool. -Richard P. Feynman

Laws are spider-webs, which catch the little flies, but cannot hold the big ones. -Anacharsis

Offline darkmorford

  • Cellarman
  • **
  • Posts: 69
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #6 on: April 14, 2011, 11:24:14 am »
Thanks for all the opinions, guys. I have one of the stick-on thermometers on my fermenter, and I don't think I've ever seen that go above 75, so hopefully the flavor won't end up too far off.

I'm going to start doing gravity checks today to see if it's anywhere near done. Unfortunately, I forgot to check the gravity before I pitched (rookie mistake, yes, but I am a rookie :P), but the instruction sheet for the recipe kit tells me that the final gravity is supposed to be 1.012–1.017, so at least I have something to compare against.

Offline denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 27133
  • Noti OR [1991.4, 287.6deg] AR
    • Dennybrew
Re: Is my fermentation stalling?
« Reply #7 on: April 14, 2011, 11:26:50 am »
Thanks for all the opinions, guys. I have one of the stick-on thermometers on my fermenter, and I don't think I've ever seen that go above 75, so hopefully the flavor won't end up too far off.

Just for reference next time, that's about 10F more than what you want it to be usually.

I'm going to start doing gravity checks today to see if it's anywhere near done. Unfortunately, I forgot to check the gravity before I pitched (rookie mistake, yes, but I am a rookie :P), but the instruction sheet for the recipe kit tells me that the final gravity is supposed to be 1.012–1.017, so at least I have something to compare against.

The kit probably also told you what OG to expect.  If you used all the ingredients and got the specified volume, you can use that.  And I wouldn't be too certain that you'll hit the FG they predict.  Maybe so, maybe not...
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline darkmorford

  • Cellarman
  • **
  • Posts: 69
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #8 on: April 14, 2011, 04:57:27 pm »
The kit probably also told you what OG to expect.  If you used all the ingredients and got the specified volume, you can use that.  And I wouldn't be too certain that you'll hit the FG they predict.  Maybe so, maybe not...

It does; the expected OG for this recipe is 1.042–1.046. I just took a sample, and unless something is wrong with either the hydrometer or my reading of it, the brew is already down to 1.010—already below the expected FG for the stuff, and it's only been four days.

I've got a feeling something's very wrong with this picture, but I don't know where to start looking.

Offline denny

  • Administrator
  • Retired with too much time on my hands
  • *****
  • Posts: 27133
  • Noti OR [1991.4, 287.6deg] AR
    • Dennybrew
Re: Is my fermentation stalling?
« Reply #9 on: April 14, 2011, 05:01:16 pm »
With the low OG and the high temp, it could very well have fermented that fast.  Remember, that unless you've brewed a recipe enough to have repeated experience with it, any FG prediction is just a guess.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell

Offline Hokerer

  • I spend way too much time on the AHA forum
  • ********
  • Posts: 2654
  • Manassas, VA
Re: Is my fermentation stalling?
« Reply #10 on: April 14, 2011, 07:11:12 pm »
With the low OG and the high temp, it could very well have fermented that fast.

this
Joe

Offline darkmorford

  • Cellarman
  • **
  • Posts: 69
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #11 on: April 16, 2011, 08:19:45 pm »
Well, the gravity hasn't budged since Thursday, and the airlock isn't doing anything at all. I'm going to see if I can't find a couple hours tomorrow to bottle this stuff. Wish me luck!

Offline a10t2

  • Official Poobah of No Life. (I Got Ban Hammered by Drew)
  • *********
  • Posts: 4696
  • Ask me why I don't like Chico!
    • SeanTerrill.com
Re: Is my fermentation stalling?
« Reply #12 on: April 16, 2011, 08:28:11 pm »
I'm going to see if I can't find a couple hours tomorrow to bottle this stuff.

Way too soon. Give it another week at least.
Sent from my Microsoft Bob

Beer is like porn. You can buy it, but it's more fun to make your own.
Refractometer Calculator | Batch Sparging Calculator | Two Mile Brewing Co.

Offline darkmorford

  • Cellarman
  • **
  • Posts: 69
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #13 on: April 16, 2011, 11:46:02 pm »
I'm going to see if I can't find a couple hours tomorrow to bottle this stuff.

Way too soon. Give it another week at least.
Not to be a jerk, but why? The gravity isn't getting any lower, the bubbling has stopped completely, and several people now have said that the higher temperature would make the fermentation go faster. Everything points to it being done fermenting, so what's to be gained from letting it sit dormant another week?

Offline tschmidlin

  • I must live here
  • **********
  • Posts: 8198
  • Redmond, WA
Re: Is my fermentation stalling?
« Reply #14 on: April 17, 2011, 12:57:08 am »
It's not dormant, just because the yeast are done fermenting doesn't mean they're done cleaning up after themselves.  You should really taste it and see how it's doing, but absent that, leaving it on the yeast for another week is a good idea.
Tom Schmidlin