So I brewed a bavarian hefe on friday night. Saturday I had a ton of action in the carboy, sunday the same. Monday when I got home from work it was about 1 bubble a sec so still real active but no blow off so I popped in the airlock. Woke up this morning and it had nearly blown the stopper out of the carboy. I hooked up the blowoff to be safe. This afternoon I came home from work and and there was about a bubble every 2-3 sec. I hooked up the airlock again so that I could clean the blowoff hose. Just checked on it and the same thing happened. I am only using a 5gal carboy right now so I know there is not much headspace for a 5gal brew. Is this whats causing it? The temp in the laundry room is a constant 68-69 all day. I guess i didnt think it would be this active for 4 days. I dont have a hydrometer yet so if there is another way to know whats going on in there let me know. Im not worried, I am relaxed, and I am having the best brew I can find here in the middle of nowhere. Just curious as to what might be happening.