Hey friends. So I'm working on my first home brew. It's been in the fermenter for 3 days. After the second day of vigorous fermenting and hardcore airlock bubbling, the krausen started subsiding and was like that for about a half day. Today the krausen is back to the top of my carboy, but the bubbling isn't quite as dramatic. I'm unsure as to why the fermentation seemed to stop for awhile then start again. Could something be wrong or is this just a natural thing? It seemed to be a little cold in my "brew room" at one point, so I turned the temp up a bit. Seems to be good now. Here's a pic...any advice would be appreciated on how to get a consistent fermentation.