Home Brew Forums > Home Brewing Beer > General Beer Discussion > question on my fg.
Reply
 
Thread Tools
Old 01-22-2013, 06:39 PM   #1
basilchef
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2012
Location: Boston, massachusettes
Posts: 755
Liked 27 Times on 23 Posts
Likes Given: 8

Default question on my fg.

The refractometer reads just over 6.5 brix and has been steady for two days. The beer was made 8 days ago (simple ipa). Should be lower. I tried rousing the yeast and upping temp but nothing is working. If i add more yeast do i risk over attenuation? I dont want it too dry.


basilchef is offline
 
Reply With Quote
Old 01-22-2013, 09:06 PM   #2
LAbrewer
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2012
Posts: 112
Liked 10 Times on 6 Posts
Likes Given: 1

Default

Use a hydrometer.


LAbrewer is offline
 
Reply With Quote
Old 01-23-2013, 12:42 AM   #3
daksin
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
daksin's Avatar
Recipes 
 
Join Date: Aug 2011
Location: San Diego, CA
Posts: 4,435
Liked 320 Times on 276 Posts
Likes Given: 346

Default

To elaborate, refractometers don't work once alcohol has been produced. Use your hydrometer and find out what the actual gravity is.
__________________
I can't be arsed to keep up this list of what's in the fermenters, but hey, check out the cool brewery I own!

twitter.com/2kidsbrewing .. facebook.com/2kidsbrewing .. 2kidsbrewing.com
daksin is offline
 
Reply With Quote
Old 01-23-2013, 12:45 AM   #4
BeerCrafter2011
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: Plattsburgh, NY
Posts: 94
Liked 6 Times on 5 Posts
Likes Given: 18

Default

Refractometers do work with alcohol present, but you need to find the calculation to determine the actual reading in specific gravity. Someone has a spreadsheet out there. I know there are calculators that correct for fermented beer.
__________________
Obsessed about brewing.
BeerCrafter2011 is offline
 
Reply With Quote
Old 01-23-2013, 12:47 AM   #5
BeerCrafter2011
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2011
Location: Plattsburgh, NY
Posts: 94
Liked 6 Times on 5 Posts
Likes Given: 18

Default

That being said, I would still use a hydrometer.
__________________
Obsessed about brewing.
BeerCrafter2011 is offline
 
Reply With Quote
Old 01-23-2013, 05:07 AM   #6
basilchef
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2012
Location: Boston, massachusettes
Posts: 755
Liked 27 Times on 23 Posts
Likes Given: 8

Default

I cant i dont have a test tube for a hydrometer sample.
basilchef is offline
CityOChampBrew Likes This 
Reply With Quote
Old 01-23-2013, 05:21 AM   #7
CityOChampBrew
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Pittsburgh, Pa
Posts: 655
Liked 59 Times on 49 Posts
Likes Given: 45

Default

Quote:
Originally Posted by basilchef View Post
I cant i dont have a test tube for a hydrometer sample.
Buy one, they cost like 3-4 bucks
__________________
Primary: cabernet sauvignon, El dorado pale
Seconday: Golding abbey, Flanders Red, Cocoa IPA, S.C.A. IPA
Bottled: Golding kolsch, Raspberry Mead, Berlinner Weisse, Caliente Pale ale, Amarillo/Citra wheat
Kegged empty
CityOChampBrew is offline
 
Reply With Quote
Old 01-23-2013, 05:31 AM   #8
IffyG
Feedback Score: 1 reviews
Recipes 
 
Join Date: Oct 2009
Location: Nashville
Posts: 1,390
Liked 60 Times on 49 Posts
Likes Given: 20

Default

Quote:
Originally Posted by BeerCrafter2011 View Post
Refractometers do work with alcohol present, but you need to find the calculation to determine the actual reading in specific gravity. Someone has a spreadsheet out there. I know there are calculators that correct for fermented beer.
http://onebeer.net/refractometer.shtml

There is a calculator that does the correction for you. It's not perfect, but it gets the job done.

Honestly, I've never understood the 'you have you use a hydrometer' for FG. Sure you have to use a hydro to know the exact value, but you can certainly tell if the beer is done (within a few points of FG) using a refractometer.
IffyG is offline
 
Reply With Quote
Old 01-23-2013, 07:37 AM   #9
basilchef
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2012
Location: Boston, massachusettes
Posts: 755
Liked 27 Times on 23 Posts
Likes Given: 8

Default

Completely forgot about the alcohol veriable. When I originally looked at a chart it was for a pre fermentation brix to gravity conversion. Thanks for the posts, I'm right where I should be ''points" wise. Cheers


basilchef is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
European bottle capping question + yeast starter question Rev2010 Beginners Beer Brewing Forum 12 12-01-2013 04:37 AM
Stock pot question and general nrmew brewer question Charliehart1 Beginners Beer Brewing Forum 8 04-19-2011 03:33 PM
Idopher question and basic yeast washing question msa8967 Beginners Beer Brewing Forum 2 02-12-2011 05:21 PM
Quick temprate question, and promary/secondary question. Cazamodo Fermentation & Yeast 4 10-23-2010 08:52 PM
Making Chocolate Oatmeal stout. OG question and smack pack starter Question. britishbloke Beginners Beer Brewing Forum 10 02-23-2007 06:01 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS