Get a good book first, and really do some research before you dive in to corals. Stony corals need at least a year of stable tank stability (or so), with alk, cal, mag, nutrients, flow, & lights almost perfect. some are easier than others, so research is best. Almost all anemones are hard to keep except for maybe bubble tip & a couple of others, however, they move around and sting things, so you can't have certain corals with them Softies are usually good to begin with.