Rescue is fighting his reflection all the time

[NatashaDawn]

So I rescued this 3 1/2 year old male last week and he constantly head bobs, beards, bites at, claws at, and lunges at his reflection in the tank. Should I just cover it all? It scares me to put him in a way where he cant see out at all. The first day in the new tank he was arm waving himself and now he is almost doing all the other behaviors 15 out of 20 minutes. I mean all the time. Any suggestions?

 

[Esther19]

Try covering 3 sides and leaving the front open.