Is there a coral that you can't seem to keep alive?

[Dearth]

Anemones I can't seem to keep these guys alive at any cost however give me a Brain coral and it will flourish

[Coral Hoarder]

Clove Kenya trees toad stools Yuma's not rics just yumes fail I don't know what's wrong that I can't keep basick corals lol

[whatcaneyedo]

Fungia, Xenia, and Ricorida once flourished in my tank but in recent years just die slowly. I think its because its much cleaner now. I have relatively fewer fish and skim more heavily.