Blackout works.
I told this to marine reef club group in LA. They had all sorts of algae.

Vac out as much as possible, o the water change, dose some Fe and NO3, add lots of aeration micro bubbles in the tank, then hope.

I think it's more of a good macro growth = poor noxious algae growth dynamic personally.

I could be wrong, but this seems to be the pattern and the lowest picked fruit available.

Regards,
Tom Barr