I have a 120 gallon growout in which i am keeping a 6 inch dorado,5.5 inch tatf and 2 chalceus around 8 inches.Within the first week of purchase the dorado has starated chasing them down incessently.How to stop it from bullying ,I have got 2 back up tanks but want to keep the dorado in community as i have other plans for the back tanks.So is buying another one will prevent this behavior.Help otherwise I am about to lose one precious tatf