Plant growth in Coral/fish tank - question

[Bloodasp]

I guess it's one of those things that depends on the person if it is a good idea to take care of, much like mantis shrimps, hermit crabs, and mushrooms, xenia, bristle worm etc. If you don't mind dosing a bit more calcium they can be good I guess. The only thing that it seems like everyone agrees is bad are cyanos and hair algae.