I purchased a Domino damsel for my tank last week, thinking that this would help along with the cycle (which i think is done allready, Amm=0.25, No2=0, No3=10). My LFS said that this was a pretty bad idea since the Domino is very aggressive and will be very territorial and possibly stress out any future tank mates, i.e. percula clowns, yellow tang etc. Should i get this damsel out now? or wait until I add more fish and see how he reacts?? BTW, the Domino is rather small about 1"