small ones need phyto...some dunk em in a little bath
they all need intense lighting....anenome, clams, SPS all require the same quality light.....for LONG TERM survival.
Due to thier shell growth they deplete you CA and ALK like gangbusters....so if you don't dose those now, you may need to then.....
The blue one that is shown in my recent pics I have had over a year, was my first. Pretty easy to keep if you have the right lighting IMO