well it all depends on the fishes own attitude....i have a 10-11inch male jag,2 10 inch oscars,6-7inch male vieja biff,2 5 inch balas,1 6inch female jack dempsey,1 5inch senagal birchir,1 20something inch gibbicep,1 7inch severum all been living merrily together for about a year and there was one time thought id lose jag but hes mellowed after i rearranged tank....it works fine for me,BUT YOU NEVER WILL KNOW
Tanks 5ft/2ft/2ft