Cyano issue help

[tmccaffery]

I have cyano or red slime and seems to have damaged one of my corals.

I checked phosphates with 2 different Hanna

Hanna 774 measured at 0.05

Hanna 736 measured at 1ppb I'm guessing 0.003

Maybe my tank too low in nutrients?

 

[tmccaffery]

I just checked for nitrate and it shows nothing. Is that possible? The water didn’t turn color I’m using Red Sea pro

 

[Sk8r]

Go up the thread into the 'stickies' atop all, and read up on cyano. Generally cyano won't damage anything it sits on but it can harm it by denying it light.

 

[Sk8r]

Nitrate won't be the issue, though it's nice to have it low.