Hi,
Sorry to say that but i dont recommend u a tang to buy, i am not telling this for the fish's health, i am saying this for u, in a 55 he ll ALWAYS have white spots on him, and this spots ll go to other fish, and this ll drive u crazy!! There is a very suitable fish for your aquarium, they re dwarf angel, very colourful and nice! But becareful w/ your fuzzy dwarf, he ll be 7-8" and percula ll be eaten when your dwarf get this size, but u can change him w/ a maroon so that ll be very good,
Dwarfs re my favourite,
Good Luck w/ Him,
Selim