Is this green coralline?

[willienelson]

Hi all! I was wondering if this is green coralline. It's not hair or film algae. A tooth brush does nothing. What do you think?

This is 4 month old Marco Rock from BRS. I'm really happy about all the different reddish and purples hues that are popping up all over :smokin:

 

[reefman]

is it slippery when touch? if not then is coraline algae

 

[reefiness]

Doesnt look like gree coralline. Seems like the natural progression of algaes you get on new rock from my experience. Not entirely sure what type of algae it is, but i wouldnt worry about it. The coralline is taking hold and will cover it all at some point.