Candy Cane Coral

[Biff_Sykes]

Hey guys. I bought some candy cane coral and placed it in my sand. It came with Brown stems. After 5 days the tip of them stem seems to have strivaled a little bit and turn blood red and the rest of them stem turned pink. The heads still look nice and remain the same. What is wrong with it? Help.

 

[Mrc8858]

That's coraline algae and cyano.

 

[Biff_Sykes]

Is coraline, cyanobacteria, or red slim harmful? Or is it just cosmetic?

 

[Mrc8858]

Coraline is good. Cyano is not though. Signs of excess nutrients or low flow