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Old 11-12-2012, 05:16 PM   #11
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A lye mixture might clean it off, but lye can also etch glass at a certain strength, so hopefully you can get it to a proper dilution to eat away the gunk and then rinse before it has time to etch that carboy.


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Old 11-12-2012, 05:49 PM   #12
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Vinegar and hot water....

Most likely scale from the OxiClean

Vinegar will clean it completely


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Old 11-12-2012, 10:01 PM   #13
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Originally Posted by chuckularone View Post
Does it look hazy, like chemical etching? You said they were old carboys, do you know what was in them before? If they were used in a lab, handling chemicals potent enough to etch the glass, you might not want to use them for brewing.
These were used for winemaking. I tried vinegar and then a strong star san solution and it's barely noticeable now. I am going to try hot water and vinegar soak next.
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Old 11-12-2012, 10:03 PM   #14
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Did you use hot water with the oxyclean? I'd say the bleach is a waste of time at this point.
I just used luke warm water. Next time I will use hot water.
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Old 11-12-2012, 10:04 PM   #15
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Originally Posted by CBelli View Post
Vinegar and hot water....

Most likely scale from the OxiClean

Vinegar will clean it completely
That's what I am doing now. Vinegar and hot water, how long should this soak?
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Old 11-12-2012, 10:50 PM   #16
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If it tastes like water, it's probably fine, if you die, I'll admit I was wrong.
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Old 11-13-2012, 12:05 PM   #17
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Quote:
Originally Posted by hawkeyes

That's what I am doing now. Vinegar and hot water, how long should this soak?
My scale comes off in 24 hours


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