Picky corals?

[Bumblebeereefer]

I know i should not have hair algae but does it really have any effect on the coral itself?

 

[zuri]

I know i should not have hair algae but does it really have any effect on the coral itself?

depends on the amount. too much an it will suck the nutrients out of ur tank starving corals.
depends where some corals get irritated by algae other's grow right over