I'm wanting at least one of these Damsels to help with flatworms and for that beautiful blue. I understand that the Springeri is one of the least aggresive damsels but I'm still a little concerned. I've got flasher and fairy wrasses along with a pair of clowns, pair of anthia and a yellow tang. Would having more than one decrease the chances of aggression? Would the Springeri be more apt to fight among themselves or with other fish if I got 2 or 3? I've got a 120g tank.