Need help with this algae??

[erso]

So I had this neon green algae on my rocks which is now turning white but to seems like it’s starting to get crusted on the rock is this the beginning of coralline algae or is it just dying off ?? Snails seem not able to eat it off and it doesn’t blow off any info would help

 

[Jekyl]

New tank uglies.

 

[Coral_Daddy]

this is natural, it prevalent in any tank for the most part. More blue light than white will help cut down growth and make it less noticeable.