any coral I own would never have algae on its septa or coralline simply because it would be disallowed, and be algae free regardless of any factor. Simply having it not be on the frags is an option too, changing nothing about the water, and water changing is an option too but I didn't want to leave out the simplest...having no algae on the coral frags and still not changing any other aspect of the tank, that's left out so commonly. if you don't like the look as the algae encroaches, or if it begins affecting how the polyps extend and the workings of the frag, we have giant threads that show thousands of people simply opting out of the algae and continuing on.
