Several corals not looking too hot

[saullman]

I wanted to get some opinions on a few of my corals. I am a newbie at keeping corals. Some of them maybe dying or already dead. Right now I have no fish in my tank. Just a few corals, snails, hermits, and a blood shrimp. I'm not sure if I'm supposed to be feeding the corals some kind of coral food or if they are getting the nutrients from the water and light?
I do have a few that are doing good like my Florida ricordia, hammer, and Duncan which all seem to be happy.

 

[Newstead]

They look like they are starving. If you don't have fish, get some Reef Foods or other coral food. Don't overdo, but get some nutrients in them.