*Ss Brewing Technologies Giveaway - Enter Now!*

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > First PM - OG way low. I thought I did everything perfectly?
Reply
 
LinkBack Thread Tools
Old 11-18-2011, 08:37 PM   #1
MTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Gaithersburg, Maryland
Posts: 55
Default First PM - OG way low. I thought I did everything perfectly?

I've done 9 extract batches and all of them were perfect. Today, I did my first PM and the OG was 1.052. It was supposed to be 1.065. Here's the process of my brew day:

1) Heated 2 gallons to 162* then added 5lbs of grains.
2) The temp dropped down to 153* then I wrapped the pot in a towel and blanket.
3) After an hour, the temp was 152*.
4) I heated 2gal of sparge water in another pot to 170*, then teabagged the grains in that for a few minutes then put the lid on and let it sit for a few more mins (the temp dropped to 159 during this).
5) Took the grains out, added the wort from the mash and started my boil.
6) Did everything like I usually do, then whirlfloc with 10 mins left and added 6lbs of LME at flameout.
7) Cooled the wort to 100* then added 1gal of ice that I froze last night.
8) Aerated the wort by transferring it from my primary to another bucket 6 times.
9) Took my gravity reading and was surprised to see it so low

What did I do wrong??

*notes: I did notice quite a bit of hop sediment in my graduated cylinder when I took the gravity reading

__________________
MTB is offline
 
Reply With Quote Quick reply to this message
Old 11-18-2011, 10:02 PM   #2
Walker
I use secondaries. :p
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Walker's Avatar
Recipes 
 
Join Date: Sep 2005
Location: Cary, NC
Posts: 11,236
Liked 86 Times on 77 Posts
Likes Given: 11

Default

I've never done a PM brew, but I think the "tea bagging" is probably not very effective at rinsing the sugars from the grains, so you might have left a lot behind.

How was the grain crushed? And what was it in?

That gravity is so low, it's coming up to like 25% efficiency, which is almost impossible.

__________________
Ground Fault Brewing Co.
Walker is offline
 
Reply With Quote Quick reply to this message
Old 11-18-2011, 11:17 PM   #3
MTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Gaithersburg, Maryland
Posts: 55
Default

I followed this guide: http://www.homebrewtalk.com/f39/easy...ng-pics-75231/

that's where I got the teabag idea from.

The kit is NB's RyePA and the grains were 3lbs Rahr 2-row, 1.5lbs Weyermann Rye malt, and 0.5lbs carared. They came crushed from NB.

I also just checked my hydrometer in distilled water and it read 1.000.

__________________
MTB is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:16 AM   #4
rebel80
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2010
Location: Memphis, TN
Posts: 45
Liked 1 Times on 1 Posts
Likes Given: 2

Default

Quote:
I think the "tea bagging" is probably not very effective at rinsing the sugars from the grains, so you might have left a lot behind.
This. It sounds more to me like you're just steeping grains rather than doing a true partial mash. You're just not going to extract sugars doing it this way like you would from a true mash.
__________________
rebel80 is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:29 AM   #5
MTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Gaithersburg, Maryland
Posts: 55
Default

Quote:
Originally Posted by rebel80

This. It sounds more to me like you're just steeping grains rather than doing a true partial mash. You're just not going to extract sugars doing it this way like you would from a true mash.
How am I not doing a true partial mash? I followed the guide that has worked for many others
__________________
MTB is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:34 AM   #6
HomebrewMTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2008
Location: Raleigh, NC
Posts: 408
Liked 10 Times on 10 Posts

Default

This ain't a tea party. You gotta squeeze it. Use a colander and a pot lid to get the goodness out. And stir it thoroughly during sparge. Then squeeze it again.

__________________
HomebrewMTB is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:37 AM   #7
rebel80
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2010
Location: Memphis, TN
Posts: 45
Liked 1 Times on 1 Posts
Likes Given: 2

Default

Quote:
This ain't a tea party. You gotta squeeze it. Use a colander and a pot lid to get the goodness out. And stir it thoroughly during sparge. Then squeeze it again.
This would definitely extract the sugars, but conventional wisdom would tell you that this would lead to tannin extraction as well. That being siad, I've squeezed the hell out of plenty of grain bags when steeping specialty grains and never noticed any ill effects.
__________________
rebel80 is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:43 AM   #8
MTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Gaithersburg, Maryland
Posts: 55
Default

Quote:
Originally Posted by HomebrewMTB
This ain't a tea party. You gotta squeeze it. Use a colander and a pot lid to get the goodness out. And stir it thoroughly during sparge. Then squeeze it again.
I did stir and squeeze during the sparge. I just don't get how the OG got so damn low...
__________________
MTB is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 01:49 AM   #9
Rev2010
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Bayonne, NJ
Posts: 1,689
Liked 77 Times on 55 Posts
Likes Given: 223

Default

I'm thinking it was the grain crush. My first AG hit my target OG. My second one, a hefeweizen, came in way low. Everybody suggested it was the crush and I emailed Northern Brewer and their response seemed to agree with it and an apology, but that is wheat which is a smaller kernel. I have a grain mill on the way now for my third AG batch.

Rev.

__________________
Rev2010 is offline
 
Reply With Quote Quick reply to this message
Old 11-19-2011, 06:04 AM   #10
MTB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Gaithersburg, Maryland
Posts: 55
Default

Quote:
Originally Posted by Rev2010 View Post
I'm thinking it was the grain crush. My first AG hit my target OG. My second one, a hefeweizen, came in way low. Everybody suggested it was the crush and I emailed Northern Brewer and their response seemed to agree with it and an apology, but that is wheat which is a smaller kernel. I have a grain mill on the way now for my third AG batch.

Rev.
Was your first AG from NB? What about the 2nd time around? I might have made mistakes during my first PM, but seriously.....I don't see how they could affect the OG by so much.
__________________
MTB is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
I thought I would never go AG vince805 All Grain & Partial Mash Brewing 16 08-16-2011 02:01 AM
Is AG really not as scary as I thought? Cold Country Brewery All Grain & Partial Mash Brewing 38 03-17-2011 06:15 PM
I thought All Grain was cheaper??!! cmorgan All Grain & Partial Mash Brewing 59 02-12-2010 01:14 PM
Hit by a thought LarMoeCur All Grain & Partial Mash Brewing 5 11-06-2008 09:01 PM
First AG! Went perfectly! Coastarine All Grain & Partial Mash Brewing 20 10-04-2008 04:35 AM