In my opinion harlequin tusks and are not the easiest fish to take care of. I had a beautiful big one and unfortunately I had to give it to my friend who has a more peaceful tank. Tusks are not fast and agressive fish and I had mine with a niger and picasso triggers. I tell you... this tusk was impossible to feed! Every piece of food I put in the tank for it, the triggers snapped it up before the tusk even got to it. I had to overfeed for this guy to get any food. So it had to go, lesson learned. But they are beautiful fish. They just need the right tank mates.