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Advice? What are these?

Discussion in 'General Discussion' started by jeffmr4, Aug 12, 2024.

  1. Aug 12, 2024 #1
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    I have these brown or dark purple dots on all my rocks. The rocks are caribsea life rock so they came purple. Does anyone know what these are? (last photo of all)


    [​IMG]

    Thanks.
     
    Last edited: Aug 12, 2024
  2. Aug 12, 2024 #2
    Netfish and Chill Des Moines, East Side

    Netfish and Chill GIRS Member

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    Can't see the photo, but sounds like the formation of coraline algae.
     
  3. Aug 12, 2024 #3
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    I wondered that at first but there are too many of them and separate from each other.
     
  4. Aug 12, 2024 #4
    Netfish and Chill Des Moines, East Side

    Netfish and Chill GIRS Member

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    Can you upload a new photo? My web page says its a bad file.
     
  5. Aug 13, 2024 #5
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    Can you see it if you click on 'last photo of all' on the original post?
     
  6. Aug 13, 2024 #6
    Brett McCarthy Urbandale

    Brett McCarthy

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    Looks like coralline to me. It spreads pretty quickly into small spots. Here’s mine from years ago on white rock

    upload_2024-8-13_17-26-1.jpeg
     
  7. Aug 13, 2024 #7
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    I'm hoping so.
     
  8. Aug 13, 2024 #8
    Brett McCarthy Urbandale

    Brett McCarthy

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    Can you upload a photo of the rocks with the lights on full white? That will really help
     
  9. Aug 13, 2024 #9
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    Here is another link,

    Rocks
     
  10. Aug 13, 2024 #10
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    Here is a link to 8x zoomed with white light,

    Rocks
     
  11. Aug 13, 2024 #11
    Brett McCarthy Urbandale

    Brett McCarthy

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    Q
    Quite a bit going on there. It looks like you have either hair algae or Cyanobacteria. That would be the dark brown patches. The lighter patches seem to be either coralline or maybe bubbles on the algae. You definitely have some coralline in there. Do you have any turbo snails?
     
  12. Aug 13, 2024 #12
    jeffmr4 Cedar Rapids, IA

    jeffmr4 Well-Known ReefKeeper GIRS Member

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    I took a rock out when I did a water change tonight and tried to scrape some off. It didn't come off easily so neither filamentous hair algae nor cyanobacteria. Maybe it it is coralline? Like a deep red one?

    Oh, someone in another forum asked me to post nitrates and phosphate levels. They are .2 and .02 respectively.
     
    Last edited: Aug 13, 2024

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