Been trying to save a brain coral I posted about a while back that's been receding and is on it's last legs as of now. Tried a FW dip, an H2O2 dip, and just today bought some tincture of iodine from the pharmacy and used a few drops and dipped in that. When I removed the coral, these were squiggling around. Is it possible this is the root cause? If so, what are they and how do I kill them without bombing the rest of the coral?