Red algae

[Thereefdoc]

I have been noticing this red algae starting to grown on my live rock. It’s mostly encrusted on the rock and seems to be spreading at a decent pace. I tried scrubbing it but it’s not that easy to remove. Is it cyano, red turf algae or a reddish coralline algae?
TIA

 

[ndrwater]

Sounds like Coraline.
Cyano blows/wipes off easily.

 

[Thereefdoc]

It might be. The tank is less than 6 months old and it’s spreading really fast.

 

[Thereefdoc]

Here are some more recent pics. I’m thinking it’s some type of coralline, but still not sure. Any idea?? Anyone?