Having just moved it will cause the coral some stress, so you won't see any polyp extension for a little while. Since its a new buy the coral was probably already stressed in your other tank. Best thing to do now is wait. Watch to see if the polyps start to extend in a few days. Signs of stress would be bleaching (turning white), slimey or lots of mucus, or crumblely looking (when parts of it start to die). If the coral is stressed, try moving it to a lower part of the tank, with less flow.