Does he have a light? You can try turning it off for a bit if he does. It cuts down on reflections. Tango contiously flares in one corner all day where he can see himself. I had the white side of a greeting card taped to that side for a while and it helped. It was harder for him to see himself against the white.
Thank you, he has finished flaring but his gill is still stuck out on the right side....when i go to the tank he comes to greet me and puts his fins down and the left gill down but the right one is still stuck...hmmm
I think as long as he doesn't seem to be in distress or pain, it should work itself out. Is it his beard? The part that he pushes out when he flares? I've heard of them getting stuck before but I've never experienced it myself.