What is this???

[Brittany Boorman]

I came back from a long weekend away to find this covering my coral. What is it??? Will it hurt my Zoas and how do I get rid of it!?!

 

[Evan28395950]

Red cyano, can blow it off with turkey Baster

 

[James M]

Cyano, It can smother the zoas to death if not taken care of. You can put the frag in front of a Powerhead to get it off