I guess water changes with RO/DI water that you know is REALLY clean and a good salt mix is basically my default for any issues I'm having BUT...don't you think it makes a little sense? If you starve the algae for nutrients (e.g. get your nitrates and phosphates down way below detection) then those algae should have more trouble taking root.
Then there's the other side of the issue in that since the corals have algae in them, they'd need some nutrients as well...so that complicates the argument. BUT I do know that for whatever reason, when you make your water really clean, nuisance algaes have a much harder time growing than corals do. Well, depending on the coral. I mean, some corals love dirty water...EvilMel's green skirts zoanthids for example.
Also, it seems that the photosynthetic algae in corals are more easily able to capture nutrients than the nuisance algaes.