I am going to be getting a 210G freshwater tank going and am looking for ideas. I'd kind of like to get some unique fish. Stuff you dont find at every pet store. Thus far the tank will have 3 Pictus Cats and a Common Pleco that are be moved from my 55G. Im thinking of getting a Black Ghost Knife as well. Can anyone think of some other species that might be interesting, large or small?