Set up a new tank, added platy (2) of them, one very aggressive to the other, fish store said add more. Added 3 more. Now the aggressive one is picking on 2 of the new ones and the same one. Now here is the kicker to my problem, all the new fish are also picking on the original one. Pet store said I could bring back the aggressive one, but has told me to FLUSH the other. What gives????? Please help, not sure what to do!!!!