Ok, I made 10 gal of a nice pale ale. I put 5 gal in a 6 gal carboy and the other 5 gal in a 5 gal carboy. Pitched a pack of notty in each and in 6 hours they both started bubbling away, no problem.
The next morning I saw that on the 5 gal carboy the krausin pushed through the airlock and it was dry, I filled it. Now 4 days later the 6 gal carboy if finished but the one that went dry is bubbling away, lots. I don't think it's yeast activity, It looks like tiny co2 bubbles rising to the top. Is it ruined? What happened?
Help me understand what it could be.