Fish Won't Stop Chasing Reflection

[AeonMapa]

So I've had my little electric blue jack Dempsey for a little over a week now. He's doing good, eating well and not shy at all. The problem is he WONT STOP chasing his reflection. The first two days he was quite nervous, hiding in caves most of the  time. On the third day however he discovered his reflection. Now he only stops chasing it to eat and to sleep. The rest of the day he chases it up and down the glass. Like literally non-stop. I'm worried this could be bad for him eventually. Any thoughts?

 

[Ryan10]

I've had  a few fish do this.  Sometimes they just stop after awhile other times they keep going until they have a chimple.  You can try putting a on a couple background pieces on the sides of the tank or painting them if he doesn't stop.