Rod's food for reefs is a really good frozen food. You can google it to see if someone close to you sells it. Different corals require different food. Some need really good lighting, some marine snow, some require higher amounts of calcium. Check out this site and others to see what your new additions require.
I'm going to a frag swap tomorrow and have my list made out. I'll only buy the ones that I have researched and know that I can take care of. I don't like to take chances and spend money on something just so I can watch it starve to death. I, like most of us in this hobby have learned the hard way.
Good luck.