Sour Beer Darkening in Carboy?

[boomslang]

Hey guys, just a quick question.

I've brewed a spontaneous fermented sour that I dumped on some nectrines a while back. I've fined it recently ready for bottling and after a few days it seems like its started to develop some kind of darkness on the surface of the beer. It's almost like a light purple and I have no idea what it could be.

Oxidation possibly?

Help me out here, cheers.

 

[TheMadKing]

It's likely just sediment dropping out. Clearer beer appears darker in a carboy because there's less particles for light to reflect off of. If you fined with gelatin, then a layer of uber-clean beer near the surface is normal. It will drop fully clear once you bottle it and store it cold for a week or so.

Can you post a picture just to make sure I'm not telling you something wrong though?