SO I have wanted L200 for years I finally found some in my area and picked up two. Last night one was pushing around the other this morning I wake up to find one dead. Will an L200 kill another one? Are they that territorial. It is a 75 gallon. I haven't seen any aggression from other fish. The one that died was the most active and always out in the open he was also more colorful than the others I am really saddened by this loss. I never loose fish and of course I have to lose my most expensive hardest to find fish.