I am pretty sure most of the people will say not to add six line and dottybacks. Dottybacks are literally the meanest fish you can have. Six line are also killers. In my experience, the dotty and sixline will fight, the sixline will loose and die and then dotty will go after the docile firefish. Been there :P
If you really like bicolor dotty...why not get a royal gramma? You will get a black dot on the tail and nice attitude as compliments
