looks Like Cyano

[Carz]

looks like Cyano all over the sand. of my 225. Just got new test kits and Phosphates and Nitrates are 0. My plan is to turn off the skimmer for 3 days and then run it for ten hours a day after that. Take off the GFO/Carbon reactor for a while and feed a bit heavier. Any other thoughts?

 

[Dan_P]

looks like Cyano all over the sand. of my 225. Just got new test kits and Phosphates and Nitrates are 0. My plan is to turn off the skimmer for 3 days and then run it for ten hours a day after that. Take off the GFO/Carbon reactor for a while and feed a bit heavier. Any other thoughts?

Hard to say for sure from this picture. Can you retake this photo with more white light?