What is this orange on the rock ??

[kbarr31]

Started a new tank a few months ago used dry rock, rubble from LFS in sump and ocean direct live sand. Have added corals but have dipped them all. Have torches, acans, Duncan’s, gonis. I have no clue what this is it’s spreading across my rock sporadically and is bright orange under my blue light. Does anyone know what this is I don’t remember ever seeing this in my other tank

 

[KrisReef]

That's the orange hitchhiker of death?

Or maybe a coralline algae, or some other encrusting settlement community member. A few coralline algaes will glow like that, I think this is what you we are looking at?

 

[Schlafrig]

Can you add some pictures of what it looks like under white light?

 

[Rebbel]

Dying coraline will flouesce like that. The coraline around my overflow will glow like that after a water change and exposure to air.

Not bad not good .