Can anyone identify what this is for algea?

[Mainereefer11]

Tank is 3 months old. Went through diatoms phase wondering if this is the next one. Been observing this growing for a week or two. It’s developed very slow.

 

[Auquanut]

Are you referring to the greenish tint on the rocks? If so, that's perfectly normal. What have you got for a clean up crew?

 

[NanoDJS]

your rock is becoming ALIVE !!!!

 

[Mainereefer11]

I have a limited cleaned up crew. like 7 turbo snails, 1 nassarius, 1 margarita, an maybe a Nerite I can’t remember. Yea the green tint. I haven’t tried brush it off or anything just observed it’s growth so far. I even upped the White spectrum a little to see if it would make it grow faster. I have a tomini tang as well an he’s a great janitor.