Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Repitching
Reply
 
Thread Tools
Old 01-20-2011, 02:05 AM   #1
emjay
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
emjay's Avatar
Recipes 
 
Join Date: Jan 2011
Location: Toronto, Ontario
Posts: 12,712
Liked 1716 Times on 1604 Posts
Likes Given: 1

Default Repitching

So I've been helping my brother with a kit beer that has stopped at 1.021 SG. Thing is, this kit is supposed to be a very close imitation to a macrobrew beer and it is far too sweet and underattenuated to even resemble that beer.

The kit was really fresh, manufactured about 8 days before making it, so I figured I could trust the yeast to be adequate, but mrmalty and my cellphone calculator both say the yeast was only half as much as needed.

So I've never repitched before, or even had to, but I've waited long enough to know it's fermenting no further. So my question, because I don't fully get the theory behind repitching when the slurry is probably adequate to throw another beer on top of, is whether people have actually had much success repitching. I don't have access to amylase except for beano right now, which I'd rather not use, and swirling/raising the temp hasn't been enough on its own, so its really my only option. He bought a case of 6 kits, so there's a yeast packet for each one and I can pitch one of those, but if it's a largely frivolous attempt I'd rather save it for his next batch (combined with reusing the current slurry), because if I have to end up buying yeast for a future batch, I'm not sure which would give the result he wants.

Also, if I do repitch, is there any need to re-aerate? I'd think, especially having swirled it a fair amount, that there'd be too great a risk of ending up with oxidized, cardboard-tasting beer. But I've never had to do this before so I have no idea.

I'm sorry if this has been asked and answered a million times before. I tried to search, but right now, my internet access is limited to my cellphone, and my android browser doesn't seem to like the search tool on this site whatsoever.


emjay is offline
 
Reply With Quote
Old 01-20-2011, 02:57 AM   #2
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,939
Liked 59 Times on 52 Posts
Likes Given: 4

Default

How long has it been fermenting? Definately do NOT re-aerate!


__________________
Newer, better, more streamlined sig as per the forum police.
COLObrewer is offline
 
Reply With Quote
Old 01-20-2011, 03:28 PM   #3
ksbrain
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2007
Location: Mystic, CT
Posts: 1,018
Liked 11 Times on 11 Posts
Likes Given: 2

Default

You could also try adding amylase enzyme. There was a post a week or two ago about revitalizing a fermentation with it, and it sounded like it worked well for that person.
ksbrain is offline
 
Reply With Quote
Old 01-21-2011, 08:16 AM   #4
emjay
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
emjay's Avatar
Recipes 
 
Join Date: Jan 2011
Location: Toronto, Ontario
Posts: 12,712
Liked 1716 Times on 1604 Posts
Likes Given: 1

Default

Quote:
Originally Posted by COLObrewer View Post
How long has it been fermenting? Definately do NOT re-aerate!
No hydrometer movement for about a week. For such a simple beer I don't think I'm overreacting

Quote:
Originally Posted by ksbrain View Post
You could also try adding amylase enzyme. There was a post a week or two ago about revitalizing a fermentation with it, and it sounded like it worked well for that person.
I pointed out in the OP that my access to amylase right now is limited to Beano tablets, and I'd really rather not use those.

I checked my hydrometer in water and, temperature-corrected, it gave a reading of 1.008 - could the minerals in tap water account for that? I tested it a week ago and it's moderately hard water. And the sweetness of the beer doesn't taste anything like ~1.013 SG. Also, would boiling the kit and additional LME it called for make a difference? I added them to boiling water in the fermenter, but they weren't actually boiled.

I can't believe a kit has me so confused lol… I'd RDWHAHB, but it's not my beer and my brother has 5 more of these kits sitting around… I'd like to figure out how to make things go more smoothly rather than waste them all.
emjay is offline
 
Reply With Quote
Old 01-21-2011, 10:29 AM   #5
Jaybird
Sponsor
HBT_SPONSOR.png
HomeBrewTalk 2012 Vendor Giveaway Participate
Vendor Ads 
Feedback Score: 2 reviews
 
Jaybird's Avatar
Recipes 
 
Join Date: Jul 2006
Location: Nor*Cal
Posts: 6,776
Liked 643 Times on 449 Posts
Likes Given: 184

Default

It is common practice to repitch if you dont see the results you are looking for, loads of people do it with great results. I think I would if I were in your shoes at this point. DO NOT RE-AERATE!!!! Is this dry yeast your using and what kind?? Look on the pack is it expired?? What was the fermentation temp?? What was to OG @ 60*F??
You are working with a living thing here, they may just be done, fat and happy and you may need to bring some more to the party...
Jay
__________________
Need a False Bottom for your Keg, Kettle or Cooler?

I have been making custom False Bottoms for just about everything since 2008

Nor Cal Brewing Solutions, Reddings local homebrew store
(530)243-BEER and (530)221-WINE


Still have questions PM me here or hit the website.

http://www.norcalbrewingsolutions.com and like us on Facebook https://www.facebook.com/NorCalBrewingSolutionsfor Facebook only promos too
Smoke Cigars? www.stogietoys.com

*Member: The HBT Sweaty Fat Guy Cigar Club
Jaybird is offline
 
Reply With Quote
Old 01-21-2011, 12:06 PM   #6
dstar26t
If it's worth doing, it's worth overdoing
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Location: Ridley Park, PA
Posts: 1,248
Liked 35 Times on 33 Posts

Default

Do not use amylase enzyme.
Get some yeast actively fermenting in some wort and pitch it. You could brew another one of those kits (pitch the proper amount of yeast) and add krausen from that kit to this stuck one.
__________________
Next: No idea
Fermenting: Oktoberfestbier, Kolsch, Homegrown Hop IPA 2015, Doppelbock, Egregious-ish, Barrel Fermented Dreg DelcoLambic, Sacch Trois Helles
Drinking: Oat & Conan DIPA, RIS, Carrot Blossom Cedar Mead, Dusseldorf Altbier, Cider, Rye Berliner Weisse, Sauerkraut Fermented Gose, Gueuze, Brett Blonde, Kriek, Saison, Sour Blonde
Barrel aged: RIS, Rye Barleywine, Tripel, Wee-Heavy
dstar26t is offline
 
Reply With Quote
Old 01-21-2011, 12:26 PM   #7
COLObrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Pea Green, Colorado
Posts: 2,939
Liked 59 Times on 52 Posts
Likes Given: 4

Default

I think it's done. I'd be surprised if it went lower than 1.020, this is usually what happens with these kits where you don't know what went into the extract. There could be a ton of unfermentables. I could send you some juniper yeast, it seems to chew everything down to "overattenuated" but then it's probably not worth shipping to Canada. You could culture some yourself but it will take weeks.

Keep on brewing my friend
__________________
Newer, better, more streamlined sig as per the forum police.
COLObrewer is offline
 
Reply With Quote
Old 01-21-2011, 01:07 PM   #8
dstar26t
If it's worth doing, it's worth overdoing
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Location: Ridley Park, PA
Posts: 1,248
Liked 35 Times on 33 Posts

Default

Yeah, if it's done it's done, what was the OG? On the next one, pitch the proper amount of yeast and maybe do a fast ferment test along side to see if they match. If it still finishes high you can use a more attenuating yeast or add simple sugar (corn/table/beet) in place of some of the extract.
If you don't want to use simple sugar, another trick is to put a pound of milled 2-row in a grain bag into the kettle (before boiling) with your extract and water and hold it at a low temp of like 146-148 for 30 mins, then remove the grain bag. That will change the fermentability of the wort since the enzymes in the grain will continue to break down the sugars in the extract. You may have to omit some of the extract since you'll get sugar from the grain or you can top off with more water post-boil to get your intended OG.
__________________
Next: No idea
Fermenting: Oktoberfestbier, Kolsch, Homegrown Hop IPA 2015, Doppelbock, Egregious-ish, Barrel Fermented Dreg DelcoLambic, Sacch Trois Helles
Drinking: Oat & Conan DIPA, RIS, Carrot Blossom Cedar Mead, Dusseldorf Altbier, Cider, Rye Berliner Weisse, Sauerkraut Fermented Gose, Gueuze, Brett Blonde, Kriek, Saison, Sour Blonde
Barrel aged: RIS, Rye Barleywine, Tripel, Wee-Heavy
dstar26t is offline
 
Reply With Quote
Old 01-21-2011, 01:32 PM   #9
emjay
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
emjay's Avatar
Recipes 
 
Join Date: Jan 2011
Location: Toronto, Ontario
Posts: 12,712
Liked 1716 Times on 1604 Posts
Likes Given: 1

Default

Quote:
Originally Posted by dstar26t View Post
Do not use amylase enzyme.
Get some yeast actively fermenting in some wort and pitch it. You could brew another one of those kits (pitch the proper amount of yeast) and add krausen from that kit to this stuck one.
I like this idea a lot. Seems obvious now that I think about it, but things often do! Thanks.
emjay is offline
 
Reply With Quote
Old 01-21-2011, 01:39 PM   #10
dstar26t
If it's worth doing, it's worth overdoing
HBT_SUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2008
Location: Ridley Park, PA
Posts: 1,248
Liked 35 Times on 33 Posts

Default

You may want to over pitch the next kit slightly since you'll be removing yeast from it for the "stuck" one.


__________________
Next: No idea
Fermenting: Oktoberfestbier, Kolsch, Homegrown Hop IPA 2015, Doppelbock, Egregious-ish, Barrel Fermented Dreg DelcoLambic, Sacch Trois Helles
Drinking: Oat & Conan DIPA, RIS, Carrot Blossom Cedar Mead, Dusseldorf Altbier, Cider, Rye Berliner Weisse, Sauerkraut Fermented Gose, Gueuze, Brett Blonde, Kriek, Saison, Sour Blonde
Barrel aged: RIS, Rye Barleywine, Tripel, Wee-Heavy
dstar26t is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Repitching help OneToothBrewingCompany Fermentation & Yeast 1 10-08-2010 01:24 AM
Repitching onto trub BrewsCampbell Fermentation & Yeast 1 08-06-2010 02:08 PM
Repitching question... blkandrust Fermentation & Yeast 5 05-26-2010 02:02 PM
Repitching question coffeegod Fermentation & Yeast 1 03-02-2010 11:09 PM
Repitching Limits markcubed Fermentation & Yeast 6 09-02-2009 03:46 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS