Krausen patches

[nicklew]

Hi All
If anybody could advise. I've always had these dark patches build up up on the krausen. Always wondered if these should by stirred back in or left. I don't honestly know what they are. Yeast or some sediment from the brew kit.

 

[DBhomebrew]

Proteins, hop particles, etc. Disregard, carry on.

 

[nicklew]

Proteins, hop particles, etc. Disregard, carry on.

Thanks hoped it was nothing. Just always starts with a nice white froth then adds the dark patches. Just wondered if it was yeast that needed stirring back in

 

[ncbrewer]

This is called braun hefe. Some German brewers remove it, but most home brewers just leave it. Don't stir it in - it would cause astringency (or so I've read).