how long has your tank been running?
me personally, i'd see if i could take the blue surgeaon back for credit, and look at a few smaller fish, i might even reccommend the same for the yellow, but hey do seem to be ok in your size tank(just nt the best size for 1)
and i'd forget about anemones too, they are the most difficult thing to keep in a aquarium, they have very special needs, and even MOST experienced keepers cannot keep one for more than a year, whereas they should live for 100+, so in the aquarium they are best not attempted(by most)
go for some soft corals instead, there are many that really don't even need special lighting
and if you want more color, how about a pair of purple firefish, jsut get both toghetehr and watch(before you but) them to see if they are getting along well and living together(not just in the same tank), although they will not mate(successfully), they ahve been known to fight so you really want a pair taht will mate(odds are youll never have any young) and do not get more than 2
and how about a pair of cleaner shrimp, they are great scavengers and add a lot of coolor to the tank, plus they will help to control ick
HTH