Author Topic: Wort stability test  (Read 2351 times)

Offline yso191

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Wort stability test
« on: June 27, 2013, 07:44:27 PM »
I decided to do my first ever wort stability test on this last brew.  As I understand it 3 days is a passing grade.  Mine went five!

I'm wondering what your longest is.
Steve

Offline oly

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Re: Wort stability test
« Reply #1 on: June 27, 2013, 08:03:40 PM »
What is a wort stability test?

Offline bboy9000

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Re: Wort stability test
« Reply #2 on: June 27, 2013, 09:05:12 PM »
A wort stability test is a way to test your brewery sanitation practices.  Take some boiled and cooled wort, put it in a covered sanitized container (I use a glass horseradish jar) then set it somewhere warm.  It should go three days without going sour, making CO2, developing bacteria and mold, etc.  If not you probably have something contaminating your wort (dirty chiller, tubing).  See the following from Wyeast:

http://www.wyeastlab.com/com-qc.cfm
Brian
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Offline rjharper

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Re: Wort stability test
« Reply #3 on: June 28, 2013, 06:20:09 PM »
Hmm. I'll need to try this on my next batch. Pour off a pint or so into a sanitized mason jar and see what happens.

Online HoosierBrew

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Re: Wort stability test
« Reply #4 on: June 28, 2013, 06:47:33 PM »
I'm brewing Sunday morning.  Think I'll give it a try. 
Jon H.

Offline tygo

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Re: Wort stability test
« Reply #5 on: July 01, 2013, 09:05:03 AM »
I do it periodically to check my sanitation practices pre-ferment.  I usually am able to go seven days with no visible activity and no drop in gravity. 
Clint
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Offline joe_feist

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Re: Wort stability test
« Reply #6 on: July 01, 2013, 09:27:55 AM »
I've not done this before, but it's on the list for my next batch. I don't typically have contamination isues that I notice...but maybe they're small problems that I'm just not picking up on. I think this test is a great idea and it really doesn't cost much. I imagine just a cup of wort in a Ball jar would be plenty, right?
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Offline tygo

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Re: Wort stability test
« Reply #7 on: July 01, 2013, 09:36:35 AM »
I imagine just a cup of wort in a Ball jar would be plenty, right?

Yep
Clint
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On Tap: Lucifer's Hammer Golden Strong Ale, Dopplebock, Old Fuzzynut's Ale

Online mtnrockhopper

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Re: Wort stability test
« Reply #8 on: July 01, 2013, 10:11:27 AM »
I imagine just a cup of wort in a Ball jar would be plenty, right?

Yep
Enough to fill a hydrometer tube I bet. Probably less needed if you have a refractometer.
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