Dinos or Diatoms?

sotsreef

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Here is a picture, if needed I can post tank details but was gonna see if anyone could tell from just a photo. I’m talking about the brownish spots on the white dry rock.
711274FA-7904-4071-BFC5-9212DB355935.jpeg
 

WHITE BUCKET CHALLENGE : How CLEAR do you think your water is in your reef aquarium? Show us your water!

  • Crystal Clear

    Votes: 88 41.5%
  • Mostly clear with a tint of yellow

    Votes: 106 50.0%
  • More yellow than clear

    Votes: 7 3.3%
  • YUCKY YELLOW

    Votes: 4 1.9%
  • Other (please explain)

    Votes: 7 3.3%
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