I've been working on the pond, and it's 12longx4.5widex2-3ft deep. It is between 900-1000 gallons, if i make it all 3 ft. deep with a few shallow shelves it can be 1100+. I'm really interested in predators and want to keep natives. I was wondering what you guys would recommend to keep in my pond. I do NOT want koi. I have a more than adequate filter system that keeps the water crystal clear year round with perfect quality. I was thinking a channel cat with some sunnies or bass, or bass with bowfin and bullheads, just anything that is big and predatory, and by big I mean 12 inches +. I live in central Indiana and the pond last year was fine with overwintering bluegills