There's lots of info out there on how to get rid of it, here's one..... (AquaNerd: Hair Algae...Solutions That Don't Require You to Pull Your Hair Out!!!
You might want to investigate on what's causing it though and try to address that. It might be over nutrients/nitrate from your left over from your cycle. Over feeding, too much sunlight, too long a photo period, bad lighting, phosphates, the type of food, water selection, salt selection etc. Could just be new tank syndrome as well
It's a laundry list that takes time to work through but once you break the cycle then the hit and miss treatments to get rid of it go away too (and alot of other algae issues).
Which do you want to pursue, or both?