Hey guys really new to homebrewing and just tried my first brew on Sunday. I used a beer kit(APA) and used dry yeast that i re-hydrated as directed. 9:30 tonight will be 72 since i pitched and i have not seen any action in the airlock. I did just pop the airlock off to peak in an it looks like there is a layer of foam. Does that mean it is fermenting fine? or should I consider repitching?