not sure if any addressed this but a mandarin is a fish that requires a mature tank.their diet consists solely of live copepods.these will take a long time to show up in your tank. i would wait atleast six to 8 months before adding one. some pet stores try to tell you they have food for them but mine eats nothing i put in the tank he only grazes for live food. they are beatiful fish though mine is probably my favorite fish in my tank.