About 5 days ago I started my homebrew kit and followed the directions to the letter. After maybe 48 hours the thing started to foam and bubble up and was starting to get really active. But 2 days ago I put a base heater on in the room because it is colder than the rest of my house. I set it to 72. Now the foam is gone and there are no bubbles in the carbuoy. Did I kill the yeast by making it too warm? I've turned off the heater but I'm concerned the yeast will no activate again. Can I add more yeast? Have I killed the batch?
Don
Don