ive had my maroon clown close to 10 yrs now her best buddy was a blue tang i lost after approx having him for about the same time ..originally this tank when first started was stocked with sailfin and powder brown tang ..the blue tang and clown were introduced last ...all fish were moved into my current tank about 3 yrs ago and during that move i lost my powder brown and 6 months later the sailfin ( all fish id had for many yrs ) was peaceful even with 3 tangs but now blue tang was boss with the maroon clown ..now maroon clown has been buy herself i guess for a year and probably regards the whole tank as hers ..i have changed things abit as ive added corals and some extra rock at the back but i want to add a tang or rabbit fish for algae control but i feel she will not take to this well ..so im considering adding maybe 2 or 3 fish at once to minimise aggression ...another blue tang ?? ..i welcome comments ..she can be nasty