Shawn,
Theo is right.....the most common problem in pond are catfish. They will directly compete with your bass. I wouldn't let a single one get over 3 pounds. They will not only eat your other fish, but they can also affect the reproduction with your other species.
You said you put tile in your pond. The cats usually don't reproduce which is a good thing. If you give them something round, they will more than likely use it. Next thing you know, you will have a great Cat pond, but BG and LMB really suffer.
