Finally have an update that's not so great. Good news is that the tank has been flawless! Clean, stable, easy, etc. etc. However, turned the lights on yesterday AM to my Firemouth looking a bit tattered and lethargic. He's always been beautiful and very active. Came in this AM and he was upside down and dead on the bottom. All other fish completely fine. I think I know what happened though.....The FM always chased and bullied the little Green Terror (GT was much smaller)....well after about 6 months + the GT is almost the same size as the FM. I noticed yesterday AM that the GT was flaring at and chasing the FM. I wonder if he finally had enough and turned the tables on him. Nothing has been added to or changed in the tank for 6 + months.