What do I do???

When I am catching crappie one after another but all short fish? I am not a very good crappie fisherman but I would like to get better. I was on Roberts on Saturday evening and they were really biting in the standing timber. I usually drop a minnow on one rod and then jig fish with another but I could only fish one rod at a time because they were biting so fast. Do I change locations and leave biting fish? Do they group together by size? Do I need bigger bait or jigs? Some advice would be great!

Had the same problem at Waco, I went a little deeper and changed to a creature bait like a Frog and started to get bigger fish, I wish I could tell you what else I did but I would be called a liar lol its one of those things you would have to be there to believe! If that doesn't work I would move on to the next one.