I have a 180 gallon set up and am interested in making it a native tank. I live in Michigan and my Dad is always fishing so I have access to these fish. I am thinking Sunfish, Bluegill type fish. I would really like a catfish, and was at a lfs today and they had a nice Blue Channel Catfish, which the label said grew to 27"max, I came home to research the cat before buying and now I'm reading they get bigger than that?? What catfish could I put in a native 180 that wouldn't outgrow it???