I have a candy cane frag that has been doing well since starting the tank 5 months ago. There are three heads and one is showing some brown growth. I tried to blow it off with a turkey baster and no luck. The one next to it seems to be doing okay and is puffy. Any ideas? Thanks!
Probably algae and likely some other stuff of some kind. Endoliths live in coral skeletons and might be benefical under some circumstances. You can try dipping it but I would just be patient.