I would recommend spectrum foods thera + or boyd's vita diet in small pellets for the clowns. Ocean nutrition formula one was specifically made for clowns. You can try mixing in some cyclopeez flake for a color enhancer. Personally, I think making your own frozen mix is the most cost effective & healthiest for your fish. Checkout
Melevsreef.com - Welcome! for a recipe and general good information on reefkeeping. This frozen mix can be fed to your corals also.