Two days ago one of my clowns decided to bungee out of the tank for some cheap thrills. It was ~4 months old and maybe 3/4". It was in my 10G with another about the same size but it was definitely the dominant one. I'm now left with the survivor, a shy, probably 5/8" black ocellaris. My problem is that he hardly moves from his area in the top left of the tank. He either stays vertically on the back left silicone seam or on the top left just below the lip and only makes the attempt to move when I feed him. He used to come out with the female whenever I came in the room, but now nothing. I've only got a Koralia 1 but could this be too much flow? What can I do to entice him to come out of his mourning?