I just brewed a blue moon clone (ag). I used wyeast belgian wit yeast, first time using it. Has been fermenting away for 2 weeks at about 67 F. I popped open the bucket today for gravity/flavoring sample and was greeted by a layer krausen still floating on top. Smells fine, took my sample and it tasted fine gravity was 1.012. I am not too worried about it but I was wondering if this normal for this yeast or wheat beers. I am used to my krausen dropping out after a few days.