I have a Purple gorgonian that closes up while all other corals look great. I stir up the sand bed and the gorgs polyps start to come out 20 mins later and usually stay out for a few days to a week and then will close up again. What am I doing here that it likes? feeding it I am assuming so what can I add to help the polyps stay out? I feed reef roids once a week along with various frozen and pellet fish foods