I have a beer (braggot) in primary that has a high percentage of lactose in it. It has developed a white film on the top of the beer after about 4 weeks. I don't think it's an infection at all, it looks a lot like cream floating on the top.
Has anyone experienced this when using lactose?
1 gallon batch
4 oz of lactose
1 pound malted oats
1 pound honey
Oats were mashed and sparged, then the lactose and honey were added to the 100 degree wort.
No temperature control on the fermentation.
Originally Posted by Yooper
...it's fine if it's fermenting.