Anybody know what this is?

[Morgan Rodgers]

Anybody know what this red stuff growing off my Zoa is?

 

[Not an IT guy]

Might be cyano. If you can blow it off easily then it is. I’d suggest you try and suck it out before it goes all over the place. Pain to get it all out.

 

[Hugh Mann]

Hard to tell. Turf algae or cyano maybe?
Can you get a picture with the day lights on?

 

[old salt reefer]

So if it looks just like that and chemiclean won't kill it what is it? Doesn't spread, same day or night.