I have little white hairs on my live rock

[skeleton_key8]

Ok firstly i want to apologize if this is in the wrong forum i had no idea where to put it so i took my best guess. anyways i have little white hairs coming off my live rock, they cover all the purple coralline algae, and most of my live rock. they are not on my sand or my walls of my tank. my tank has only be running for about a half a week and my live rock was only put in 2 days ago. I'm very new to this and i want to know, is it good or bad, and will it go away.
thank you for your help =)