From the HBD Archive
Subject: blue stuff on wort chiller
Date: 1992-07-20 15:18:05 GMT

Based on my world-class understanding of chemistry, I'd guess that the
blue stuff that forms on your copper wort chiller is copper sulfate.
If I'm right, then you definitely want to get rid of it; it's toxic.
You might try rinsing with a little vinegar and salt in boiling water.

Mike McNally
Digital Equipment Corporation
Western Software Lab

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