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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Cloudy with a chance of Star San
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Old 02-16-2011, 11:39 PM   #11
theredben
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Originally Posted by remilard View Post
The cloudiness is the dodecylbenzene sulfonic acid coming out of solution which makes it ineffective (the pH may still be low as the phosphoric acid is what is lowering the pH and it will remain in solution). So you need it to be at the correct pH and clear. If either of these conditions is violated it is not effective.
I have been making fresh batches of cloudy star-san with my well water for months, and no infected batches.
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Old 02-16-2011, 11:58 PM   #12
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Mine goes cloudy and I haven't had an infected batch yet.
I second that. I think that as long as your water is drinkable i.e. not acid or base, which water usually (a neutral 7) is I presume, you are okay. I don't keep it mixed for more than a few hours though. Still, no problem batches due to infection as of yet.
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If the inside of your fermenter looks like there was a monkey pooh throwing contest...you're golden.
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Old 02-17-2011, 12:11 AM   #13
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hmmm. So if it is clear a week later is it still good or do I need to do a ph test.

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Old 02-17-2011, 01:12 AM   #14
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As long as it is clear you can safely assume that the pH is in the right range. If you are interested in seeing how long you can keep reusing it, then go to a pool supply store and buy some testing strips.

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Old 02-17-2011, 03:49 AM   #15
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its the pH. That is your indication. It can (sometimes) be effective when cloudy. But is still "good" at a pH less than or equal to 3.0

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