What is this in my kvass

[Applewein44576]

This is my kvass/wine it was made with a couple cups of sugar and apple cider and it developed this brown stuff its sour. Is it krausen?

 

[dmtaylor]

It is difficult to say. It resembles typical yeast residue from early fermentation. But it is somewhat possible it could be some other contaminant by wild yeast or bacteria. Ultimately, you'll know after you taste it, if the kvass tastes okay then it was probably just your yeast getting overly excited early in the fermentation. Hopefully that is all it is. If it doesn't taste good then you'll know it's the other possibility.

 

[Applewein44576]

Okay thanks I'll just have to see