I put in 300 9" channel cats this summer. Prior to doing this we are pretty sure that we caught out all of the large largemouth from the pond. I don't know a lot about channel catfish and have never had them before. I haven't ever actually seen one. My pond is fairly clear. We see bluegill and bass. I haven't seen any of them floating or anything. Where are they? How can I confirm they are there? Fishing with worms just seems to catch small bluegill.