I have been keeping a special eye out when I feed and have tried several different types of food (that make the rest of the tank go nuts lol) Brine, Mysis, Flake, Algae, Silversides, and Blackpowder.. over the course of several days. Still no shows. I will have to stay up late one night this weekend and have a look.
I cant really use aptasia as a guide, whether thats fortunate or unfortunate... I have only ever seen one small aptasia in my tank and that was some time ago. The tank is a 55 and has probably 100ish lbs of rock. so there is plenty of room to hide.