I do not think you have anything to be concerned about. As I said, this type of green algae is not normally desirable but if that is your preference, no worries
I would suggest some snails at least. It will help keep detritus and unwanted algaes to a minimum. If you allow the "green" algaes discussed to be consumed, it will make way for the purple/pink coralline instead which is what I believe is trying to grow instead.
, the CC
star is not considered reef safe so I hope this is a FOWLR
and not a reef tank.