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Fermcap turning black?

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Do you keep it refrigerated? I was told to always leave it in the fridge. Also...no that does not look normal. It looks like black mold or mildew or something.

I was told likewise.

I've only had my bottle for a little over a month, but it's pure white. And I can't imagine it turning black could be a good thing.
 
AHA ... i was NOT told to refrigerate it ... lesson learned. Bottle tossed.

Thanks guys!
 

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