I brewed, partial mash, a Blue Moon clone 6 weeks ago. The brewing process went well however, the og was lower than expected. I pitched the yeast and after several days didnt see much activity. So I racked to clean carboy, mixed well and capped up. after a couple of days I began seeing some activity. I let it set for a week+ and still didnt see the activity I would expect. Now after about 3 weeks it still is producing small bubbles and doesn't look like it is going to finish. How long should I let it go before bottling? Is there anyway to ensure i'm not going to make bottle bombs?