Making this recipe listed in the complete meadmaker book by ken schramm. 3 gallons. Put the mesh bag of berries (they were thawed but cold) in the mix on 11/13. Starting SG 1.112 on 10/22. SG on 11/13 = 1.013. I think it was about 12.9%. Was bubbling maybe once every 120 sec before adding berries and it seemed like the vigorous fermentation was done. After adding berries it's not bubbling at all. Should I be concerned?