Happy HolidaySs Giveaway - Winners Re-Re-Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > high final gravity
Reply
 
LinkBack Thread Tools
Old 04-25-2010, 01:06 PM   #1
DeepSea
Sponsor
HBT_SPONSOR.png
HomeBrewTalk 2012 Vendor Giveaway Participate
Feedback Score: 0 reviews
 
DeepSea's Avatar
Recipes 
 
Join Date: Apr 2009
Location: Colchester,CT
Posts: 190
Liked 1 Times on 1 Posts

Default high final gravity

My last two batches have had high final gravity,1.020. They were both 1.070 OG. I brew 10 gallon batches, all grain. I am using 1056 yeast with a 1 gallon starter. I always use oxygen to aerate. I use a single infusion mash ( batch sparge) at 155F with a mashout at 170F. Ferment temp has been a consistent 65F . 1056 yeast calls for attenuation of 73-77 percent. This should put me at 1.018 at 73% attenuation. Any idea what is causing this? Possible remedies?


DeepSea

__________________
http://www.mashpaddle.com
DeepSea is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 01:30 PM   #2
Netflyer
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Netflyer's Avatar
Recipes 
 
Join Date: Oct 2009
Location: Near Benedict Maryland
Posts: 812
Liked 8 Times on 8 Posts
Likes Given: 45

Default

A couple of possible ideas... W/out knowing the grist in the recipe I can't say if a component in that might be helping keep that high but what about mashing at a lower temperature? How long are you in the primary for? I use 1056 and have finished up in 1.012 range for OG's at around 1.072-1.075 and I checked and I was mashing at 152 for 90 min on that one. (IPA). Another amber ale recipe I make and use 1056 get's even lower FG's but it starts much lower too at 1.042. You could try raising your temp towards the final 1/3 of fermentation from 65 up to 68-70, might help too. 1.020 isn't that bad either

__________________
Primaries:


Kegged:
RiClarke's Guinuess Clone w/da sour 6.4% ABV 1057 SG 1009 FG

Netflyer is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 01:36 PM   #3
Yooper
Ale's What Cures You!
HBT_ADMIN.png
Feedback Score: 0 reviews
 
Yooper's Avatar
Recipes 
 
Join Date: Jun 2006
Location: Upper Michigan
Posts: 62,847
Liked 4931 Times on 3575 Posts
Likes Given: 994

Default

I think it's the high mash temperature, without knowing more about your ingredients.

Is you thermometer accurate? If you're even 3 degrees off, you could be mashing at 158 or so, which would really give you a ton of unfermentables.

You could try mashing your next beer at 152 or so, especially if it's a pale ale or another beer that you'd really like to have finish at 1.012-1.014.

__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

Find me on facebook: Lorena Evans
But I'm pretty boring so don't expect much!
https://www.facebook.com/lorena.t.evans
Yooper is online now
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 02:16 PM   #4
DeepSea
Sponsor
HBT_SPONSOR.png
HomeBrewTalk 2012 Vendor Giveaway Participate
Feedback Score: 0 reviews
 
DeepSea's Avatar
Recipes 
 
Join Date: Apr 2009
Location: Colchester,CT
Posts: 190
Liked 1 Times on 1 Posts

Default

1.020 is not terrible but I was hoping for a lower final. Recipe called for a final of 1.015. It is a green flash west coast IPA.

Here is the grain bill.
84.2 14.00 lbs. Pale Malt(2-row) America 1.036 2
7.9 1.31 lbs. Crystal 40L America 1.034 40
7.9 1.31 lbs. Cara-Pils Dextrine Malt 1.033 2

I verified the thermos and they are accurate. I think I will mash at a lower temp. I currently strike at 170 and it settles at 155. I am mashing in a keg. What do you folks use for strike temp? Are you mashing in kegs?

Thanks for the input.

DeepSea

__________________
http://www.mashpaddle.com
DeepSea is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 02:42 PM   #5
WenValley
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2009
Location: Wenatchee WA
Posts: 306
Liked 1 Times on 1 Posts

Default

+1 on the mash temperature being on the high side. I mash in a 40 quart Igloo cooler.

Beersmith brewing software takes a lot of the the guess work out of the "Strike Temperature" question. You can make adjustments for all of the mash factors such as starting grain temperature, grist to water ratio, etc. The software calculates the temperature of the strike water. I've found it to be very accurate.

__________________

'A government big enough to give you everything you want, is strong enough to take everything you have.'

Thomas Jefferson
WenValley is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 02:45 PM   #6
Yooper
Ale's What Cures You!
HBT_ADMIN.png
Feedback Score: 0 reviews
 
Yooper's Avatar
Recipes 
 
Join Date: Jun 2006
Location: Upper Michigan
Posts: 62,847
Liked 4931 Times on 3575 Posts
Likes Given: 994

Default

Quote:
Originally Posted by DeepSea View Post
1.020 is not terrible but I was hoping for a lower final. Recipe called for a final of 1.015. It is a green flash west coast IPA.

Here is the grain bill.
84.2 14.00 lbs. Pale Malt(2-row) America 1.036 2
7.9 1.31 lbs. Crystal 40L America 1.034 40
7.9 1.31 lbs. Cara-Pils Dextrine Malt 1.033 2

I verified the thermos and they are accurate. I think I will mash at a lower temp. I currently strike at 170 and it settles at 155. I am mashing in a keg. What do you folks use for strike temp? Are you mashing in kegs?

Thanks for the input.

DeepSea
For an IPA, 1.020 is pretty darn high. You've got a lot of crystal, that's part of it. 2.6 pounds of crystal sure seems like a lot- about 16%, if my quick figuring is right. A high mash temperature, combined with that much crystal would definitely keep the FG high.

In my opinion, an IPA should be mashed at 150-152 so it'll finish lower. I like my IPAs to finish in the 1.010-1.012 range, depending on the OG and grainbill.

I only mash "thick" beers or heavy beers at 155 or over. My ambers are usually mashed at 153-154. Cream ales are mashed at 150 or so. Mash temperature plays a huge part in attenuation, as does the recipe of course.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

Find me on facebook: Lorena Evans
But I'm pretty boring so don't expect much!
https://www.facebook.com/lorena.t.evans
Yooper is online now
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 03:32 PM   #7
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
ajf's Avatar
Recipes 
 
Join Date: Oct 2005
Location: Long Island
Posts: 4,643
Liked 99 Times on 93 Posts
Likes Given: 39

Default

Another vote for mashing at 150 - 152. I'd also reduce the crystal down to less than 10%. Both of those suggestions would help lower the FG.
One other possibility is the mash thickness. If you mash thick (about 1 qt / lb), then the FG will increase. If you use 1.25 qt / lb (or thinner), then the wort will be more fermentable.

-a.

__________________

There are only 10 types of people in this world. Those that understand binary, and those that don't.

ajf is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 09:55 PM   #8
kanzimonson
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2009
Location: Charlottesville, VA
Posts: 2,064
Liked 33 Times on 29 Posts
Likes Given: 1

Default

DeepSea, I love this recipe and brewed it up recently as well. I mashed at 154, and pitched with 1272 and my FG was 1.015. I agree with others that the first thing to attempt would be a lower mash temp.

I say to hell with people who tell you to reduce crystal malt. People say this all the freakin time on these forum, but I love crystal malt for every reason. I think there's an unfounded fear of overly sweet beers due to crystal. Sure, it definitely will increase sweetness but in an IPA as bitter as Green Flash's, it's exactly the balance you're looking for.

Clearly you've got a good recipe on hand (I see it's exactly the BN's recipe), and like Jamil says frequently (paraphrased), "The brewers aren't lying to you when they give you the recipe - you'll have to adapt it to your own system." For whatever reason, your system might require you to mash slightly lower than other people's systems to achieve the same results.

__________________
kanzimonson is offline
 
Reply With Quote Quick reply to this message
Old 04-25-2010, 10:12 PM   #9
DeepSea
Sponsor
HBT_SPONSOR.png
HomeBrewTalk 2012 Vendor Giveaway Participate
Feedback Score: 0 reviews
 
DeepSea's Avatar
Recipes 
 
Join Date: Apr 2009
Location: Colchester,CT
Posts: 190
Liked 1 Times on 1 Posts

Default

Quote:
Originally Posted by kanzimonson View Post
DeepSea, I love this recipe and brewed it up recently as well. I mashed at 154, and pitched with 1272 and my FG was 1.015. I agree with others that the first thing to attempt would be a lower mash temp.

I say to hell with people who tell you to reduce crystal malt. People say this all the freakin time on these forum, but I love crystal malt for every reason. I think there's an unfounded fear of overly sweet beers due to crystal. Sure, it definitely will increase sweetness but in an IPA as bitter as Green Flash's, it's exactly the balance you're looking for.

Clearly you've got a good recipe on hand (I see it's exactly the BN's recipe), and like Jamil says frequently (paraphrased), "The brewers aren't lying to you when they give you the recipe - you'll have to adapt it to your own system." For whatever reason, your system might require you to mash slightly lower than other people's systems to achieve the same results.
This is the recipe from BN. I will mash at a lower temp next time. I made some mods to my system and am still working the kinks out. I have a pump so I may strike at 165 and if I have to add heat with recirc. I can do that. I just recently had green flash for the first time and love it.

Thanks,

DeepSea
__________________
http://www.mashpaddle.com
DeepSea 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
should final gravity be this high?!?! 1990dtgl98 Beginners Beer Brewing Forum 15 03-07-2011 02:12 PM
High final gravity deathtractor Beginners Beer Brewing Forum 3 04-23-2010 03:02 PM
High Final Gravity ctoungette All Grain & Partial Mash Brewing 1 02-23-2010 04:13 AM
high final gravity newbrewr4fun Beginners Beer Brewing Forum 8 07-12-2008 06:32 PM
high final gravity sfov Beginners Beer Brewing Forum 8 05-04-2007 08:35 PM



Newest Threads

LATEST SPONSOR DEALS