I racked a bock to secondary last saturday,and i'm still getting a little action from the air lock.The FG was right on the money before I racked it.Is this normal?I also started using star san with this batch,does that make a difference?
In the primary for a week.Star San makes no difference in fermentation, just sanitizing.
It is not odd to see action in the secondary, just be lucky you are using one or you might have bottle bombs. I check my gravity once a week, once it reaches my expected FG (estimated from Beersmith), I usually wait one more week and more often than it drops a bit more.
How long was it in Primary?
Are you adding any flavoring agents in the secondary or just using it to clarify the beer more.