Mindy the tank is looking sweet, I'm having a very similar problem in the zoa tank I just can't seem to get the pest algae under control.
Finally broke down and purchased a tiny convict and 1 spot rabbit fish (Which will be re homed shortly after my problem is fixed). I would recommend them (as they have been working wonders so far) but the tank might be a tad bit small. Have any of the emeralds irritated your zoas? I stopped buying them after I watched one mow on my expensive candy apple greens
, the whole colony melted shortly after too.
Levi