I started a batch of hard cider for the first time 9 days ago. There is slow fermentation but no krausen. I used Musselmans cider pasteurized, and Nottinham yeast that said it was good at lower temps and it is in my basement in MN. 2 lbs of brown sugar added also. Should I pitch more yeast? Or would moving it upstairs to a higher temp re-fire it up?