Grey Foam In Starter

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LeeH
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Grey Foam In Starter

Post by LeeH » Tue Aug 18, 2020 10:33 am

Has anybody seen this before?

I tipped the first one away, the 2nd is much better with a different batch of DME.

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Bad 'Ed
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Re: Grey Foam In Starter

Post by Bad 'Ed » Tue Aug 18, 2020 7:02 pm

Never seen it. Was it darker than the dme?
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Re: Grey Foam In Starter

Post by LeeH » Wed Aug 19, 2020 9:44 am

Yes and most of the foam was white as normal.

Very odd. The flask was cleaned twice and dunked in starsan.


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Re: Grey Foam In Starter

Post by orlando » Wed Aug 19, 2020 10:56 am

A wild guess. Yeast acidifies wort. So has the acidity of what has come into contact with the tin foil caused a chemical reaction and led to the discolouration?
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Re: Grey Foam In Starter

Post by LeeH » Wed Aug 19, 2020 3:51 pm

No, it was already in the flask unfortunately while it was simmering on the hob.


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Re: Grey Foam In Starter

Post by Bad 'Ed » Wed Aug 19, 2020 3:56 pm

I assume the tinfoil was on the top of the starter, therefore meaning the substance can't be heavy.

I'd guess some dirt / dust either in the dme or blown into the wort at some point. Either that or you put your fag out in it and forgot.
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