He's lovely!
If you just added him to your tank I wouldn't worry about him not eating just yet. It'll take him time to settle in.
I don't think I even offered my clowns food for maybe two days after I added them. When I first did they ate it right up though.
I do use Garlic Guard for some foods that are for fish that are a little more picky. Garlic Guard is what got my blenny to start eating the algae sheets.