Bubbles

[aviationpilot06]

I am on my fourth all grain. I am brewing a belgian tripel, and I am using the yeast cake of another brew session.
48 hours after I pitched the yeast, there is no activity in the air lock, but there is a thick layer of krausen lying on top of the beer. Should I be concerned there is no bubbles in the air lock, or does it mean its just a slow fermentation?
Anyone?

[ColoradoBrewer]

If there is krausen you have fermentation. I doubt that there is anything to worry about. The air lock is not bubbling because the CO2 is escaping somewhere else. If you're using a bucket it is most likely that the lid is not sealed.

[brewmeisterintng]

If you have krausen, you had/ have fermentation. The gas escaped somewhere other than your air lock. This is typical of buckets as I have read on numerous posts. Take a gravity reading to confirm but it sounds like it happened to me.