The ones I've seen thriving in tanks seem to clean all day long and love to play in front of a vortech MP. They come from hi-flow surge waters so they like hi-flow usually. I had one that took a while to learn to chase down prepared foods like all of the other fish would do and in his case, while all of the fish were chasing down food, he would quickly dart over to the powerhead I had in there and (like an outfielder) catch the food as each piece was shot out of the powerhead. It took him about a week to start chasing the food and start picking it up off the floor.