moved my aros now 6 silver aros at 7-12"+- (for the group sizes) in a 180gal (6'x2'x2'). they are with a 22" florida gar, 13" florida gar, 18" shortnose gar, 14" smallmouth bass, 17-18" endli, 13" ornate, 2x 9" sen bichirs, 6" it dat, 5" pumpkinseed sunfish, 11" tsn. i think that is the list. in a few days i may put my 18" s.a. lungfish in it and for sure in a month or so i will be putting in my rtcxtsn. i will try to get a vid up of the tank soon. the tank has a natural look with natural sand, live amazon swards and some drift wood. it is filtered by an fx5, an emperor 400, an emperor 200, along with lots of hydroponics including pothes and bamboo.