I have 4 in a 27g tank with 2 small clowns, and no problem, the female clown is the boss, they can be aggressive to newly added fish, as they didn't take to well to a firefish I tried to intruduce, I do like the fact that they seem to stay quite small and I love the colour, but they can have an evil side to them:twised:

yea they dont really like new comers at all so i would try to make them your last edition or just dont add anymore peaceful fish after

I'd say there's a 50/50 chance that they'll either get along or try to kill eachother off. Also most damsels will be ok with larger more agressive fish but fish like dartfish and wrasses most damsels will pick on relentlessly.

Yeah, I must admit it is funny to watch them take cheap shots at the bigger fish when they're not looking. But it isn't so funny when your $80-$160 tangs end up with torn tail fins...