Pond Boss Forums INTRO Questions & Observations Catfish Nesting Boxes

I had always read that you should put gravel in the bottom of the catfish spawning boxes, has anyone else read that?

If I try to get more recruitment of my CC, I have been told to use small plastic feeders turned upside down and add an opening in one side. They seem to be about the right size here in North Texas and some of my neighbors are having great success using this method.