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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > How long do you keep Starsan in use?
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Old 09-25-2012, 03:17 PM   #11
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I've heard that the cloudy water test is not accurate because it's the minerals in your water turning the Star San cloudy, not the fact that it's "gone bad". Sometimes it looks cloudy after the first use. I dump mine every few weeks to a month. Don't really have a regular routine but have yet to have a problem.

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Old 09-25-2012, 03:22 PM   #12
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Quote:
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i make a 4+ gallon batch at a time with distilled water that i keep sealed in a bucket and test periodically with pH strips. makes sanitizing fermenters super easy; just fill it up, put the drilled lid in with whatever else you need sanitized, cover, flip and let sit a few times. usually use it a few months and mix a new batch once it get cloudy or just get too much hair/dirt/etc in it.
What kind of pH strips do you have? The ones I got at the brew store start at 4-4.5 or around there, so when I use them there is a bit of guess work.
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Old 09-25-2012, 03:50 PM   #13
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Though starsan has got a patent on it, we have something similar in Australia, and that can be bought premixed in 500ml spray bottles so I presume it would last quite a while

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Old 09-25-2012, 03:56 PM   #14
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I never understood keeping the stuff and having to test it. Since you just need to get the surface wet, i just make up a half a gallon (doing the math to figure out how much starsan i need) or even less. Sometimes i just make two pints (32) oz. Doing this a bottle will last forever. No need to buy distilled water and worry abiut testing.

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Old 09-25-2012, 04:03 PM   #15
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I test with strips because I usually keep it for 2 months or more. During that time the ph slowly creeps back up. By testing I know when to spike the mix with more Starsan or toss it.

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Old 09-25-2012, 04:05 PM   #16
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I keep it for months. Sanitation is never really a huge concern for me.

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Old 09-25-2012, 05:55 PM   #17
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This scares me. I just use it when I sanitize before brewing; I just pour some in, add some water, and let it sit until ready then i give it a thorough wash. is this bad?

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Old 09-25-2012, 06:00 PM   #18
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Quote:
Originally Posted by itsernst View Post
This scares me. I just use it when I sanitize before brewing; I just pour some in, add some water, and let it sit until ready then i give it a thorough wash. is this bad?
No, although you dont need to wash it...assuming your just using tap water your just unsanitizing it by rinsing out the foam.

This thread is more related to how long you can use starsan before it goes bad, as a lot of people(myself included when i started) would make 5 gallon batches then dump it at the end of the brew day. Its just wasteful and i noticed i was going through starsan way too fast.
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Old 09-25-2012, 06:08 PM   #19
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I try and start off brewing with a fresh batch of sanitizer and then end up hanging on to that same batch until I am kegging another brew usually (2-3 weeks or so). I also keep it until the level of "stuff" sitting on the bottom excedes my comfort zone.

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Old 09-25-2012, 06:14 PM   #20
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Quote:
Originally Posted by inhousebrew View Post
I've heard that the cloudy water test is not accurate because it's the minerals in your water turning the Star San cloudy, not the fact that it's "gone bad". Sometimes it looks cloudy after the first use. I dump mine every few weeks to a month. Don't really have a regular routine but have yet to have a problem.
The cloudy water test was stated by the manufacturer in his podcast, that's where I heard it.
That said I found a very interesting video test that should put this question to rest.
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