What is this?

cjp847

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Can anyone tell me what this is? I know I've neglected my tank a little bit. Are they bad.

20201127_135228.jpg 20201127_135359.jpg
 
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cjp847

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I'm about to move to a new 125 gallon. I'm wondering if I should just start with new rock?
 

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vetteguy53081

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Looks more like tunicates than just sponge
 

When to mix up fish meal: When was the last time you tried a different brand of food for your reef?

  • I regularly change the food that I feed to the tank.

    Votes: 45 21.3%
  • I occasionally change the food that I feed to the tank.

    Votes: 73 34.6%
  • I rarely change the food that I feed to the tank.

    Votes: 70 33.2%
  • I never change the food that I feed to the tank.

    Votes: 19 9.0%
  • Other.

    Votes: 4 1.9%
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