mine seems to like plenty of light and medium random flow ,
probably once a month it will not expand and open and ive never been sure why , i assumed my clowns hosting it annoys it ...
i moved mine around a bit in the first few weeks trying to find a spot it likes .. i have it dead centre of the tank in the sand with nothing else near it , meaning it cant touch any rocks or other corals and it seems to light this. Yours doesnt look like its too bad prolly just a bit stressed hope it comes good