It is probably not a big deal but my most recent all-grain fermentation is acting a bit oddly. Normally, I get a thick foam and gentle gurgling from the airlock during fermentation. This time, I am getting almost no foam and the solution is almost simmering... It's not simmering from heat, it's just simmering. It's giving off a ridiculous amount of gas.
This is a much darker beer than I have made previously as I used a pound of chocolate malt. The ambient temperature in my apartment is also much higher but the beer is in a room that stays coolish, more or less. Also, I had difficulty filtering this beer during the sparge process. My apparatus became stuck very badly by the size of grain that I had milled and I needed to improvise to sparge effectively under the circumstances. This may have introduced a bit of unwanted air into the solution as I needed to stir a bit.
Any ideas? Or is this simmering thing normal?