hi all . i got first coral 6 day ago its a leather coral it looked lovely but 2days ago the polups went in and have not come out again. my tank has been running about 4 months the water is all good but my nightrate is 10 my lfs said that is ok for a leather and my lighs are two t8s i was allso told that was ok for the leather. is this a bad prob with the coral. ment thanks