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So... Whirlfloc.

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The_Bishop

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I've had a sort of long running experiment with whirlfloc.

After a bunch of my own brews, as well as results from a local homebrew shop that does brewing classes on premises (50+ brews on this), we tried something I had read about and seems to work very, very well.

Whirlfloc works better when use in the last 5 minutes of the boil. We tried 15 minutes, 10 minutes and 5 minutes from the end. 5 gave the best cold break coagulation. 15 minutes seems to denature it nearly completely. 10 is better, but 5 gave the best results as far as still having the boil going on to agitate/combine it with the wort but not denture it to the point that it doesn't work.
 
I too add it at 5 minutes for the best results. I started at 15 for a few brews, moved it to 10 for a few more, and finally 5 for the last 10 or 15 batches.
 
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