What is it?

RSREEFING

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I've noticed this growing on the glass and rock. Is it algae? If so, does it have a specific name?
Something I should be worried about?

20201207_131458.jpg 20201207_131458.jpg 20201207_131505.jpg 20201207_131534.jpg
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%

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