Help with ID Dino or Cyano

hankacrank

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Hi guys, for the past week or two, I've had parts of my sand bed turn brown towards the back third of my photo period and I stir it away. This brown stuff also grew on some zoa frags and made them close and I had to turkey baste it away..I've increased flow and it's less of a problem on corals but it's still turning up in the sand bed.

Nitrate has been less than 5 and phosphate has been 0.04. I pulled GFO out of my tank last night to try ousting phosphate levels up. I didn't want to take any other drastic measures such as cutting out the lights before I was sure what I'm actually dealing with. Please review this photo and let me know your thoughts.

66BB9243-FFBD-4861-9BCF-AADDAB509499.jpeg
 

The worst paradigm to hit the hobby is getting your nutrient levels as low as possible?

  • Yes

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  • No

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  • Other (please explain)

    Votes: 15 3.4%
  • Not Sure

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