Since I was a kid fishing for panfish, I used a bobber with a minnow AND a piece of a nightcrawler on it. It helped make the decision easier on which bait they might be biting on. It also helps guarantee bait on your hook if the fish strips one of the baits off. It is flexible if crappies, gills, bass, etc. are biting. Two poles with bobbers at different depths also helps to locate where they are biting.