It's just a plague that will recur cyclically; I got some at 1 month of tank age, and it's now wearing out and dying at 4 months. I'm sure it will be back now and again.
I'm not so sure about the methods of removal. It's almost impossible to pull them off without popping the tiny ones; it's impossible for a mithrax to eat them without popping them. And the mithrax I had ate more coralline than bubble algae, if you can judge by where she was picking.
Patience and good water quality. This thing is not as much an extremophile as, say, red slime, but it can find sustenance where there is very, very little, imho.