I have what i think is a small toadstool frag, the past month or so it has started this strange growth. Has anyone seen this or have any idea what it might be?
AlgaeFix Marine. It may take a few doses to kill the stuff. Raising your Mag using Kent Tech M has also been known to help, kinda like killing off Bryopsis.
And as far as I know, nothing eats the stuff, as it releases some kind of chemical, so fish and others don't eat the stuff.