GEM freakin out at reflection of himself
 

My 5-6 inch Gem which I have had for several months has decided to attack his reflection in the glass from the time the lights come on until they go off. He really goes at it as the other fish just look And ignore him. Any suggestions on what to do as I’m afraid he will eventually exhaust himself or stress to death. There is definitely a reflection when the lights come. My tank is 625g and it is observed from both sides so cant paint a side to try to reduce the reflection....thx

Different fish have different personalities. You could just start with a new Gem tang if this is a option.