cyano

[SeeFu]

I've got these red spots growing on parts of my rockwork but when I try to scrub it off, it doesn't come off. Is cyano supposed to brush off easily or does it get stuck onto the rock?

 

[fishface NJ]

if stuck on the rock, that could be coralline algae. How old is the system?

 

[Reefing Madness]

Might be Coralline growing, I agree.

 

[SeeFu]

that's what i'm thinking it is. its realyl stuck on there.

 

[guywithatank1234]

Cyano comes of dead easy. You probable have corraline