What are these?

Adrian Em

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Not sure what these are or whether or not they are harmful?

They are all over my sump and overflow. None that I can see in main display.

IMG_0976.jpeg IMG_0977.jpeg IMG_0978.jpeg
 
Pineapple sponges. Good filter feeders, will likely decrease as tank matures.
 
 

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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