okay now what?

[Reefer Rob]

How nice are the corals on the rock? Nice enough to put up with hair algae in your tank... likely for ever?

This is a great opportunity to "cook" your rock in the dark for a couple of months, and say goodbye to the hair algae for good.

Dealing with hair algae in an established tank is not fun, and not everyone is successful. Especially with new rock.