I got my first ever frags for my first reef tank and I got two small zoa frags. First one has three polyps and the other has 5 main and maybe a handful or more small new polyps growing around. For the first frag I saw them doing well and the second frag is doing okay so far but I noticed two polyps which were different from the rest on the frag opened for the first day then have been closed since for the past 3 days. Are the polyps dying or are they taking awhile to get used to tank or?? Please help!!!