I have a NB nut brown ale kit going right now. Pitched the yeast Sunday at 4pm, about 58 hours ago. I aerated like I normally do, pitched yeast, sealed it up put airlock in. It hasn't bubbled once, I'm starting to get worried. House is at 67-68 degrees.
This is my second batch. My first batch, NB the innkeeper, it started active fermentation within 8 hours for 3 days. The nut brown ale is a totally different beer, so it might be a totally different fermentation that I am just not familiar with.
Should I be doing anything or concerned?