I started a batch of welchs on 2/3/14. 6 gallon batch with 8 lbs of frozen blueberry and 1 lb of chopped raisins. S-G -1.009, rc212 . Transferred to secondary at 1.002 and now, almost a month later I still see fermentation in the carboy via bubbles and occasional activity in the airlock, and a gravity reading of 1.000. I threw in a little energizer and nutrient, and noticed an uptick in activity...briefly. Should I be worried about this slow fermentation? Is it worth trying to tweak it along to get it to dry faster?