So, Im sure there are another hundred posts like this one, and I dont want to be one of those guys that gets bumped.... but here goes! As if letting 85lb bite trained dogs chew on me isnt crazy enough (Im a k9 kandler and trainer) I want to put a tank with carnivorous fish in my home! Ive seen where I can get 10 2" red bellied piranha for $80. Sounds like a deal to me! Im wanting to know the optimal size tank for my first set up. Im thinking 50,60,70 gallon maybe? 10 for $80 bucks sounds nice, but im thinking 3 to 5 fish though. Any help will be greatly appreciated. Like I said, im new at this thread posting thing..... please be nice!!!