Could extract be cause of stuck fermentation? - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Extract Brewing > Could extract be cause of stuck fermentation?

Reply
 
Thread Tools
Old 12-03-2006, 04:53 PM   #1
grnich
Recipes 
 
Aug 2006
Ottawa, ON
Posts: 162


I bought a light DME from my LHBS twice and both times, I got a stuck fermentation. This time it stopped at 1.03. I brewed another one with wheat extract and it fermented fine.

Is it possible that the extract is bad or non fermentable? I aerated this one good(OG at 1.045), pitched Wyeast 1056 without a starter, but with a well-swelled smack pack. After it stopped, I pitched another Cooper's dry yeast 2 days ago to get it going and it has done nothing since then. Still at 1.03. It's been at a steady 68F since I started. The yeast is good, and the aeration should be okay, could it be the extract?

 
Reply With Quote
Old 12-06-2006, 06:37 AM   #2
67coupe390
 
67coupe390's Avatar
Recipes 
 
Nov 2006
Waukesha, Wisconsin
Posts: 509
Liked 5 Times on 5 Posts


I can guess on a few. 1) Poor sanitation? ( no offense justa guess ) 2) Bad yeast (out of date?) 3) The way you aerated wort. If you shook it by hand it only aerates 20% of wort, try shaking it lightly again. If you force air into the wort "The oxinator" I would sanitize it good and shoot in about half of what you did at the time you pitched yeast. I'm really new at this but hopefully I helped you a little.

Nick
__________________
Coupe 390

 
Reply With Quote
Old 12-06-2006, 11:09 AM   #3
Dark_Ale
Recipes 
 
Jan 2005
Liberty, Texas
Posts: 623
Liked 3 Times on 3 Posts


What was the pitching temp?
Are you 100% sure that you are at 1.030?
I would guess if you got a really good foam on top while fermenting that its lower than 1.030 but just a guess
I would'nt think its the extract.
Possibly when you pitched there was a cleaner or sanitizer, in your bucket or carboy?
It might not be a good practice, but I dont aerate unless its a big beer, other than the air I get when I pour in my carboy.

 
Reply With Quote
Old 12-06-2006, 03:19 PM   #4
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Willamina & Oak Grove, Oregon, USA
Posts: 25,593
Liked 151 Times on 142 Posts


It's possible that the extract had a very high level of unfermentable sugars, 33% attenuation is ridiculous, though. Both of the yeasts you've pitched should do double that. Post the recipes and the brand name of the DME.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

 
Reply With Quote
Old 12-07-2006, 11:49 PM   #5
Ellie-ut
Recipes 
 
Nov 2006
Upstate NY
Posts: 32

Here is a link to an interesting article about stuck fermentation and using extracts. I think someone on one of these boards posted it earlier today, i don't remember how I ended up on this page

http://www.brewingtechniques.com/lib....2/lodahl.html

 
Reply With Quote
Old 12-08-2006, 03:35 AM   #6
dantodd
 
dantodd's Avatar
Recipes 
 
Oct 2006
San Carlos, CA
Posts: 1,158
Liked 10 Times on 8 Posts


Thanks Ellie.

That is an excellent article and a great reason to keep moving toward AG.

 
Reply With Quote
Old 12-09-2006, 10:04 PM   #7
Ellie-ut
Recipes 
 
Nov 2006
Upstate NY
Posts: 32

I agree Dantodd!

I went out yesterday and looked a set up...asking for something extra nice for christmas this year

 
Reply With Quote
Old 12-09-2006, 10:06 PM   #8
dantodd
 
dantodd's Avatar
Recipes 
 
Oct 2006
San Carlos, CA
Posts: 1,158
Liked 10 Times on 8 Posts


I've been cruising craigslist and asking for gift certificates for christmas/birthday this year as well. I'm pretty motivated by this thread.

 
Reply With Quote
Old 12-11-2006, 09:43 PM   #9
musicman
Recipes 
 
Dec 2006
Posts: 20

what is one way to aerate the wort?

mines in a secondary, and it looks like nothings happening

could i transfer the beer into the fermenter and then siphon it back into the secondary letting it dribble into it? you know making like a slight splash?

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
EXTRACT Stuck Fermentation (1.024) should I add Beano / Amylase Jewrican Fermentation & Yeast 6 08-31-2009 03:51 PM
Stuck fermentation...finished fermentation...? arover Beginners Beer Brewing Forum 3 04-08-2009 03:05 AM
Stuck Fermentation - I Know... Not another Stuck Fermentation Thread :( Jewrican General Techniques 23 04-07-2009 12:53 AM
Stuck Fermentation banjopicker16 General Techniques 2 06-08-2007 05:57 AM
fermentation stuck??? ahoym8e Extract Brewing 5 07-09-2006 12:08 AM


Forum Jump