I am adding a bunch of homemade structure to an existing pond that doesn't have much of any now. I am trying to manage it for trophy bass. I do have some CC. I didn't think they were a problem but after posting here I learned that they are gobbling up a lot of the food the bass could be eating. So I am going to try to get rid of them. I do not want them to use the new structure I am adding to spawn. I don't know that their fry would survive, but I certainly don't want to encourage it. I understand that if i lay a bucket or pipe on the floor of the pond this will probably be exactly what I don't want to do. I am looking at photos of some structure with drain pipe laid out stacked in between two posts. I've read about Bruce Costello's "bluegill condominiums" here. If the pipes are laying horizontally, but not right on the floor, will the catfish still spawn in them? I thought about adding some mesh to the ends and then have a vertical strip open where only BG could enter.