Be careful. Not all fish are suited for 125gal or pond life.mriversinco;2721847; said:By all means, keep the fish you want! LMB are pretty cool, and then when it gets big you can put it in the pond and see it in the shallows and think about when it was young.
Noto is right about buying a sump. Way too much money unless you can find a deal used. If you go canister, then look at fluval fx5. They're about $200 on ebay. That's about all you'd need, although you might want a HOB for top work (hang on back). If that, then look at the Hagen AquaClear for decent cheaper ones.
You don't need a chiller, but if you live where it's hot your bass will have better coloring and less stress in the summer. I'm not saying you need one, just it might be an idea.
Redeye bass look very similar to largemouth bass, only much smaller and have bright red tail.
Redfin pickerel and juvie northern pike look same.