How long do you think it will take for it to come out . And when do I start to worry.They are middle road corals. Too much flow will damage them, straight flow they do not like either. Random, not too strong is perfect. They are also medium light, but handle most lighting areas of the tank. They will balloon up when happy and get nice and puffy. Feeder tentacles come out to eat and make it look crazy poofy.
They look nice.
Usually these are pretty hardy fast growing corals.