Out of nowhere

[Kanshi]

So 120gal tank is over a year old.
This just showed up out of nowhere. And since it is in the same picture, is that red hair algae?

 

[NashobaTek]

Looks like cyano covered GHA.

 

[Kanshi]

So 120gal tank is over a year old.
This just showed up out of nowhere. And since it is in the same picture, is that red hair algae?

 

[NashobaTek]

Aptaisia, get rid of it. Can you remove the rock it's on? If not you can use several ways to get rid of it