I have all of those fish in a 120 right now but i talk to the owner of a lfs and a marine biologist friend and he said that my fish would be fine in a 1750 gallon pond.
Not necessarily true, here in Mo you can keep a Flathead catfish with a fishing liscence as long as its whithin the legal length limits, by just going fishing......they can live with RTCs and TSNs as long as theyre about the same size.