I have a regular rainbow shark, he swims around all day and is constantly out. Maybe it's cause as someone pointed out, it being an albino will like dimmer lighting.. Mine chases the tiger barbs I have in with it, other than that he's the smalles fish, doesn't show aggression to anyone else that I've noticed, and no ones showed any to him. He's with pictus cats, a 4line pim, Asian USD cat, silver dollars a blue botia, he tiger barbs, and a tiger botia. Some of these I'll grow out and put in my 120. Some will stay in the tank with him. I have drift wood for him to hide, which he does, but he's usually out and he does eat algae off the sides, and I also feed flake food, shrimp pellets and some loach pellets which he nibbles on