I was just at the LFS and they said here take this because it will die here if you don't. I did a search and am trying to find help that way and will continue doing so. But if someone know anything that might help a sick starfish please let me know. I am trying to acclimate him slowly. Maybe acclimation does not matter at this point since he sick. Maybe it would be better to just get him out of the water that was making him sick.