What is this????

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ninodeb

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this thing is growing on my rocks for a while already and i have absolutely no idea what it could be so can someone tell me what this is?

20151201_191702.jpg
 
Looks to some sort of a sponge.
 
That is how they transport water for nutrients
 
They are quite common and come in many shapes and colors.
 

WHAT IS THE LOUDEST PART OF YOUR REEF SYSTEM?

  • Return pump

    Votes: 4 5.8%
  • Powerheads or wavemakers

    Votes: 5 7.2%
  • Protein skimmer

    Votes: 14 20.3%
  • Overflow or drain

    Votes: 19 27.5%
  • Sump vibration or plumbing

    Votes: 1 1.4%
  • Cooling fans

    Votes: 9 13.0%
  • Dosing, ATO, or other equipment

    Votes: 3 4.3%
  • Nothing. My reef is surprisingly quiet

    Votes: 8 11.6%
  • Other (Tell us what makes the noise)

    Votes: 6 8.7%
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