It changes constantly. You have to try and see what works. If you have electronics you may be able to see fish and fish just above them. The problem with that is, in Louisiana, there are lots of other fish that look very much like crappie on down imaging, that aren't crappie. Large shad, for instance. You might use a minnow rig with 2 hooks if there isn't too much brush, and pay attention to which hook they are biting. Depth control is a key factor!