I have a few frags that have been in my tank for about 3 months. They havent done any growing but just yesterday I noticed they were getting smaller. Only 2 frags are doing this. I have 2 others that are growing well. Also a a fuzzy mushroom that split 5 ways, frogspawn, torch coral and some green star macro algae and they are all doing fine. Is there anything I can do to help them? Tried moving them to diffrent position thinking that might help.