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Old 09-17-2011, 03:01 PM   #1
dilbone
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Just thought I'd post my experience here since I've seen several conversations about how long sanitizers last once mixed and stored as I've wondered the same things myself.

I've had 1 gallon of star-san mixed up for 10 or 11 months and have used it on several batches, so I thought I better check pH before I use it again. It currently has a pH of 2 so I should be good to go for quite a while.

For those that dump it once it goes cloudy or after only 1 or 2 uses I'd definitely hang onto it for a while...that pH is going to stay put for quite some time.

 
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Old 09-17-2011, 03:31 PM   #2
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do you keep it in a sealed bucket?

 
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Old 09-17-2011, 07:25 PM   #3
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I only brew in Spring and Fall, and usually there's part of a gallon of mix that sits down there in the interim. As far as I can tell, it always works fine when I use it.
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Old 09-17-2011, 11:26 PM   #4
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Good longevity with StarSan is possible when soft water is used. Distilled, RO, and even softener water is quite suitable for StarSan use. This is the one time in brewing that ion-exchange softened water is usable in brewing.
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Old 09-18-2011, 01:23 AM   #5
deremer
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I saw on a episode of brewing tv that said as long as the ph is under 3 you are good to go, well i think they said three. I used it for the first time last week and it was cloudy.

 
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Old 09-18-2011, 01:49 AM   #6
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Clouding of StarSan solution is caused by high hardness in the starting water. Use soft water as pointed out above.
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Old 09-18-2011, 02:30 AM   #7
logdrum
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Distilled water makes it crystal clear for me. If I use tap it's cloudy, but the pH is right on for months.

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Old 09-18-2011, 11:49 AM   #8
smokinghole
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What does it matter if it's cloudy or clear, the stuff just needs to operate in a certain pH. I use my regular ole hard ass tap water to make up the starsan.
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Old 09-18-2011, 12:38 PM   #9
dilbone
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Quote:
Originally Posted by jaycount View Post
do you keep it in a sealed bucket?
a gallon milk jug...

As for the tap vs. RO or distilled...the metallic ions will definitely cloud it, but pH is what is important. The chlorine used to treat the tap water is more of a concern to affect the pH than the metallic ions.

 
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Old 09-18-2011, 02:11 PM   #10
agentEhrman
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Does anyone here know how long its acceptable to keep one step around for? I have been keeping 3 gallons in a bucket with a lid for about 5 weeks, I have used it probably 4 times. I noticed last week that it is getting cloudy, and I was thinking about dumping it.

 
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