right now i have one 16 inch silver arrow and 3 6 inch dorados and a jack dempsey and a pike cichlid and a shovelnose catfish in a 125 im soon upgrading to a 220 gallon.. its not the traditional 220 that u all know of thats 8 feet long and 16 inches deep like most this one is 7 feet long and 25 inches deep and 4 inches taller then my125.. i want to add a atf to this tank.. once the dorados get bigger i plan on only keeping one and selling the other 2.. ty focker