Need help identifying algae

[TouchThemMangos]

It’s suddenly becoming worse, is this Dino or cyano?
It’s long, stringy, brown/red, growing everywhere

 

[thatmanMIKEson]

the substrate?

 

[saltyhog]

If that's not Ostreopsis dinos, it's missing a really good chance to be. Do you have access to a microscope? That's really the only way to be absolutely sure. There are other dinos that can look like that.

Are you having any coral or invert stess/losses? What are your current NO3 and PO4? Have you ever done an ICP test?