Higher final gravity than expected, two batches in a row - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Higher final gravity than expected, two batches in a row
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 01-05-2012, 01:55 PM   #1
fivepoundpossum
Recipes 
 
Nov 2011
St Pete, FL
Posts: 106
Liked 6 Times on 6 Posts



i've been having problems recently with my beer not fermenting to the final gravity beersmith estimates. for example, the following amber (more like a pale ale, actually): beersmith estimates the FG to be 1.012, but after a month, i'm still at 1.017.

the fermentation temp was between 68-72 throughout. i racked it after 10 days (just read about leaving it in primary for the duration and plan on trying that next time), at which point the bubbling had pretty much stopped. i realize that might have slowed the remaining fermentation down. i've had similar problems with a couple other batches.

ideas? thanks!

Valhalla, Hall of the Glorious Dead Amber--all-Centennial Amber (December 2011)
Schedule: Brew 12/3, pitched yeast 12/4 (at 59f), Dry hopped 12/17-
Gravity: 12/3: 1.051; 12/9: 1.021; 1/4 :1.017
Boil size: 3.5g, topped to 5g
IBU: 31.2

Ingredients
Amt Name Type # %/IBU
8.0 oz Caramel/Crystal Malt - 40L (40.0 SRM) Grain 1 6.7 %
8.0 oz Caramel/Crystal Malt - 60L (60.0 SRM) Grain 2 6.7 %
8.0 oz Caramel/Crystal Malt -120L (120.0 SRM) Grain 3 6.7 %
1 lbs Light Dry Extract [Boil for 60 min](8.0 SRM) Dry Extract 4 13.3 %
5 lbs Light Dry Extract (8.0 SRM) Dry Extract 1066.7 %-added at 0 min
0.25 oz Centennial [8.70 %] - Boil 60.0 min Hop 5 10.6 IBUs
0.50 oz Centennial [8.70 %] - Boil 20.0 min Hop 6 12.9 IBUs
0.50 oz Centennial [8.70 %] - Boil 10.0 min Hop 7 7.7 IBUs
1.00 oz Centennial [8.70 %] - Boil 0.0 min Hop 8 0.0 IBUs
1 oz Centennial dry hop
1.0 pkg Safale American (DCL/Fermentis #US-05



 
Reply With Quote
Old 01-05-2012, 02:09 PM   #2
Brewnoob1
Recipes 
 
Sep 2011
Puyallup, WA
Posts: 981
Liked 24 Times on 24 Posts


.005 difference isn't far off if you ask me. You probably couldn't taste much of a difference, but that may just be me.

RDWHAHB!


__________________
Keg #1: Empty :(
Keg #2: Empty :(
Kegs 3-5: Empty :(

Ferment #1: Empty :(
Ferment #2: Empty :(
Ferment #3: Empty :(

On Deck: Something....Anything!!!

 
Reply With Quote
Old 01-05-2012, 02:14 PM   #3
FastAndy
Recipes 
 
Nov 2010
Denver, CO
Posts: 1,128
Liked 172 Times on 134 Posts


Are you correcting for temp on every gravity reading?

 
Reply With Quote
Old 01-05-2012, 02:42 PM   #4
rescue brew
Recipes 
 
Jan 2008
Winter Springs, Florida
Posts: 131

Quote:
Originally Posted by FastAndy View Post
Are you correcting for temp on every gravity reading?
Not trying to hijack the thread.... Are they all accurate at 60 degrees?

__________________
Future projects:
Kegging
Immersion Chiller
2 Gallon Igloo MLT

 
Reply With Quote
Old 01-05-2012, 02:48 PM   #5
BrewThruYou
Recipes 
 
Sep 2010
Ambler
Posts: 1,685
Liked 41 Times on 38 Posts


I'd wager that 1.017 is terminal.

Extract already has some unfermentables in it and you added 1.5# of crystal. I would've predicted 1.020 for a FG.

 
Reply With Quote
Old 01-05-2012, 02:53 PM   #6
wailingguitar
Recipes 
 
Oct 2011
Florence, Alabama
Posts: 1,651
Liked 115 Times on 97 Posts


A different yeast could easily account for that gravity difference. Besides, as far as I'm concerned, I like a slightly higher FG. When it's done, it's done... don't stress on it. If the beer tastes good, that is the ONLY thing that matters
__________________
"Why did you.... what was the point of... how drunk were you when you decided this was a good idea?" - DMartin

 
Reply With Quote
Old 01-05-2012, 03:15 PM   #7
flabyboy
Recipes 
 
Dec 2010
Dover, MN
Posts: 940
Liked 13 Times on 13 Posts


The gallon marks on fermenters are notoriously inconsistent. I'm guessing you are starting with too high an original gravity. Basically you aren't adding enough top up water. I would fill until your at 5 gallons, stir really well, then take a reading with your hydrometer. If its reading higher than expected than add more water

 
Reply With Quote
Old 01-05-2012, 03:21 PM   #8
FastAndy
Recipes 
 
Nov 2010
Denver, CO
Posts: 1,128
Liked 172 Times on 134 Posts


Quote:
Originally Posted by rescue brew

Not trying to hijack the thread.... Are they all accurate at 60 degrees?

I'm not sure really. The tube mine came in said it was calibrated at 60 and i think most that i've seen are the same.

 
Reply With Quote
Old 01-05-2012, 07:12 PM   #9
fivepoundpossum
Recipes 
 
Nov 2011
St Pete, FL
Posts: 106
Liked 6 Times on 6 Posts


thanks for the replies! all hydro readings have been corrected for temp. i'm gonna bottle this one and be done with it!

related question(s): do extract recipes tend to finish higher than equivalent all grain recipes? if so, is that because extract has unfermentable sugars already inside?

@wailingguitar, i agree. i recently bottled an ipa (OG 1.063) at 1.021 FG (estimated FG was 1.012) and i think i like it better with the remaining sugar.

 
Reply With Quote
Old 01-05-2012, 07:19 PM   #10
flabyboy
Recipes 
 
Dec 2010
Dover, MN
Posts: 940
Liked 13 Times on 13 Posts


Yes they can finish higher for that reason



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gravity higher than expected on cream stout Trail Beginners Beer Brewing Forum 12 10-27-2011 04:15 PM
Higher OG than expected - 1.152 rpatton Beginners Beer Brewing Forum 9 06-03-2010 05:53 PM
FG higher than expected - not sure what to do C2H6O Beginners Beer Brewing Forum 7 05-25-2010 04:23 PM
Higher OG than expected, what do I now change? CCBW Beginners Beer Brewing Forum 4 02-21-2010 04:19 PM
Higher than expected OG Badger454 Beginners Beer Brewing Forum 8 11-04-2008 02:04 PM


Forum Jump