I've had my 150 gal up for over a year now. The tank has been redone a million times over but my stock has stayed the same. All of my fish were bought at about 3 inches. In my tank are: green terror, red terror, Jaguar, and a flowerhorn. The green terror has outgrown all of my other fish and is at about 8 inches now. The jag is about 7" and the festae and flowerhorn are at about 5.5-6. I've noticed that all of my fish have some marks on them. Except one. My green terror is absolutely terrorizing (hehe get it) my tank and all of his fins are perfect and it seems that nobody has put up a decent fight to deter him. How do I stop the aggression?