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Surprising FG reading

Posted: Sat Apr 26, 2014 5:19 am
by FedoraDave
I'm bottling a fiver of 2Daves Irish Red this afternoon. It's been fermenting for 20 days. I racked it to a secondary last Saturday. Anyway, I figured I should take a sample just to confirm that it's done.

OG was 1.062, so I calculated the FG to be 1.015. I was really surprised to find it at 1.010. I believe I used White Labs Irish Ale yeast, which would have been my go-to in this situation anyway. I just don't remember it being this aggressive and complete before.

Sample tasted great, though, and I'm going to enjoy this batch when it's ready.

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 6:29 am
by Dawg LB Steve
That just happened with the SMaSH I kegged last weekend, it was US-05, supposed to finish @ 1.011 it finally stopped @ 1.005. Really cleaned it up nice!
:clink:

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 7:14 am
by John Sand
Similarly my Amber, currently bottle conditioning, started a little high (water volumes) and ended a little low. So, it's +1 ABV. I named it "Happy Amber".

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 9:19 am
by Gymrat
FedoraDave wrote:I'm bottling a fiver of 2Daves Irish Red this afternoon. It's been fermenting for 20 days. I racked it to a secondary last Saturday. Anyway, I figured I should take a sample just to confirm that it's done.

OG was 1.062, so I calculated the FG to be 1.015. I was really surprised to find it at 1.010. I believe I used White Labs Irish Ale yeast, which would have been my go-to in this situation anyway. I just don't remember it being this aggressive and complete before.

Sample tasted great, though, and I'm going to enjoy this batch when it's ready.
That's almost saison attenuation. What you have there is an Imperial Red :)

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 9:39 am
by Brewbirds
This must be a contagious bug on the Borg we've had two go nuts on the FG.

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 10:45 am
by Sparrow
Somethings in the water, I had a 1.059 OG finish at 1.004 with US-05.

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 11:14 am
by Foothiller
A lot of variables affect the attenuation. With US-05, the range for me has been from 69% to 84%, where FG was 1.008. In a cider, US-05 reached 90% attenuation.

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 11:26 am
by FedoraDave
Gymrat wrote:
FedoraDave wrote:I'm bottling a fiver of 2Daves Irish Red this afternoon. It's been fermenting for 20 days. I racked it to a secondary last Saturday. Anyway, I figured I should take a sample just to confirm that it's done.

OG was 1.062, so I calculated the FG to be 1.015. I was really surprised to find it at 1.010. I believe I used White Labs Irish Ale yeast, which would have been my go-to in this situation anyway. I just don't remember it being this aggressive and complete before.

Sample tasted great, though, and I'm going to enjoy this batch when it's ready.
That's almost saison attenuation. What you have there is an Imperial Red :)
Well, the ABV comes in at around 6.8%, I think, which is way higher than an Irish Red should be, but the sample was so smooth-tasting and mellow, it doesn't seem that high. I'm gonna have to be careful with this one!

Re: Surprising FG reading

Posted: Sat Apr 26, 2014 12:20 pm
by FrozenInTime
It's happened to me a few times, always love the low FG surprises. Water, temp and yeastie viability has to be just right. Wish I could do it every time, but have not attained that perfection.... yet.

Re: Surprising FG reading

Posted: Sun Apr 27, 2014 12:22 pm
by ScrewyBrewer
Mash temperature and water pH definitely both have an impact on the amount of residual sugars converted during the mash. Throw in some viable yeast and there you go, higher attenuation equals lower final gravity beer. Since moving I've been using the same mash tun and kettle I always used before. But now using Nottingham dry yeast instead of the big fat happy yeast starters I'd come to love, I'm getting lower attenuation and higher final gravities than I'm used to seeing.

The beers are clean tasting with lacing that hangs onto the glass until the end, I'm not complaining, other than it's not what I had become used to. Just thank the beer gods apparently they seem to be smiling down on your work.