Hello, my name is Thomas and I am ftom norway. Pardon my english... I am not absolutely sure about gallons, but I think yhat 1 AM gallon is about 4,5 liters...?
The biggest tank i got so far is about 90 Gal, akkording to my math(375L). I got bought 4 Channa Micropeltes(Big Snakehead/Red Snakehead), 6 weeks ago. when i got them, they where just about 4 " long. Now they have grown to about 10-11", and they really know how to fight for the food. Not because i feed them to little at the time, or wait to long between each time. They just love to stuff themselvs, either I feed them with goldfish, or shrimps(or what else you got in your fridge. The fishdealers here where I am, call it the freshwater`s answer to the Great white.... They never gives up, what so ever.. But these fishes are kind or cheap, I payed approx 9 USD, each.
But if money is not a problem for you(I mean if you have more than enough), I would go for an Red Arowana. That is really a beautiful fish, and at the same time a killer. But you have to import it from Thailand, I think. At least here in Norway it costs about 3000 USD. And we have to buy at least 10 at the time......
But I have to say, I love my snakeheads

And good luck, while you are looking for the right fish(es).
And again, sorry for my poor English..
Best wishes
Thomas
If I can be at any help, just mail me at
thomasforfaen@hotmail.com