i feed my clown frozen plankton, omega one veg flakes, ocassionally a ghost shrimp if he can find it, small portions of seaweed, and ocassionally frozen bloodworms.
I've fed clownfish mysis shrimp, brine shrimp, flake food, formula 2 pellets, bloodworms, seaweed, even finely chopped squid and scallops. they're usually not picky eaters. they do enjoy and thrive with a good variety of foods.