Does anyone know what this is?

Michael v

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It Appeared on my rocks and shaded areas of my tank after I started bio pellets.
E8366D7A-5EE2-4D31-B57C-C0AC7C43D3D1.jpeg
 
Looks like it may be pineapple sponges. If so, totally safe.
 

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

  • Yes!

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  • Not yet, but I have one that I want to buy in mind!

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  • No.

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

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