I have a 1-gallon kit from the Brooklyn Brew Shop (don't laugh; I'm a total n00b). I have a batch of the Chestnut Brown fermenting -- but there is no visible fermentation at all. While I had the blow-off tube connected there was clearly fermentation, but no longer.
Is this a clear indication of a bad batch?
EDIT: The batch is 1 week into the fermentation (out of a recommended 2 weeks) and it's currently 57°F. When I took off the airlock to check the temperature, there was nothing unusual about the smell.