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Date: 31 Aug 2007 05:38:30
From: Adam Preble
Subject: Imbalance of gravity in diluted extract batches
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I am normally an all-grain brewer, but I was using up some extract I had
been given awhile back. I did a boil of half the volume and diluted then
to get 2x my starting volume. I recall that the two parts don't
immediately mix together and give a unified gravity--the stuff on the
bottom will be denser (have a higher SG) than the stuff towards the top.
The yeast I pitched didn't take off, and I had to measure again two days
later to verify this--there's always those chances of "Immaculate
Fermentation" that finish off a beer without any hint of activity, so I
couldn't trust my eyes. The gravity was still high, but I wanted to know
if I could trust this measurement as being much better. Would the wort
have evened out over two days of inactivity?
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Date: 31 Aug 2007 06:03:49
From: David M. Taylor
Subject: Re: Imbalance of gravity in diluted extract batches
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"Adam Preble" <adamDOTprebleATgmail.com > wrote in message
news:Xns999D682F4F4Badampreblegmailcom@66.250.146.128...
>I am normally an all-grain brewer, but I was using up some extract I had
> been given awhile back. I did a boil of half the volume and diluted then
> to get 2x my starting volume. I recall that the two parts don't
> immediately mix together and give a unified gravity--the stuff on the
> bottom will be denser (have a higher SG) than the stuff towards the top.
>
> The yeast I pitched didn't take off, and I had to measure again two days
> later to verify this--there's always those chances of "Immaculate
> Fermentation" that finish off a beer without any hint of activity, so I
> couldn't trust my eyes. The gravity was still high, but I wanted to know
> if I could trust this measurement as being much better. Would the wort
> have evened out over two days of inactivity?
Are you saying that you didn't stir or aerate the diluted wort? Vigorous
aeration is the key to a good fermentation, and it also helps stir up the
wort. Dilution/mixing is a secondary factor but you still should have
stirred the wort and water together. But did you aerate??
--
Dave
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Date: 01 Sep 2007 03:29:06
From: Adam Preble
Subject: Re: Imbalance of gravity in diluted extract batches
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"David M. Taylor" <dmtaylor@SPAM.geocities.SUCKS.com > wrote in
news:gISBi.1$lf.0@newsfe03.lga:
> Are you saying that you didn't stir or aerate the diluted wort?
> Vigorous aeration is the key to a good fermentation, and it also helps
> stir up the wort. Dilution/mixing is a secondary factor but you still
> should have stirred the wort and water together. But did you aerate??
>
I stirred but perhaps I didn't aerate as I would normally do. I basically
let the big pot of slightly cooled wort pour from 2+ feet above into the
bucket. I got quite a bit of foam. Outside of that, I stirred it a whole
bunch. It was my understanding that despite this, the wort could still be
uneven with extracts.
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Date: 31 Aug 2007 07:02:43
From: Ed Edelenbos
Subject: Re: Imbalance of gravity in diluted extract batches
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"Adam Preble" <adamDOTprebleATgmail.com > wrote in message
news:Xns999D682F4F4Badampreblegmailcom@66.250.146.128...
>I am normally an all-grain brewer, but I was using up some extract I had
> been given awhile back. I did a boil of half the volume and diluted then
> to get 2x my starting volume. I recall that the two parts don't
> immediately mix together and give a unified gravity--the stuff on the
> bottom will be denser (have a higher SG) than the stuff towards the top.
>
> The yeast I pitched didn't take off, and I had to measure again two days
> later to verify this--there's always those chances of "Immaculate
> Fermentation" that finish off a beer without any hint of activity, so I
> couldn't trust my eyes. The gravity was still high, but I wanted to know
> if I could trust this measurement as being much better. Would the wort
> have evened out over two days of inactivity?
I don't know about after 2 days but after a bit of stirring (typically part
of aeration with a "mix-stir"), all of my batches have evened out just fine.
Did you aerate or stir at all?
Ed
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