I have my 450g 8'L x 3'W x 2.5'T as my native setup or should I say catchable fish in the USA. All my fish seem to be doing great and get along with the weekly standoff of my green and Texas Rio but they never get physical. I have a 11-12" LMB, 6" longear, 8-9" green, 9-10" hybrid green/bluegill, 8" bluegill, 10" Texas Rio, 12" catfish, 13-14" oscar, and 3x 13-14" white crappie. Thinking of just keeping one of the crappie but not sure yet as to which one or maybe I could keep all three. I have plenty as far as filters go. Would like all input and thoughts? I will post some pics later tonight.