What is this growing on the side of my frag?

Philly Reefer

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Its a hard structure. I cant take it out without cutting it
 

Creating a strong bulwark: Did you consider floor support for your reef tank?

  • I put a major focus on floor support.

    Votes: 53 40.2%
  • I put minimal focus on floor support.

    Votes: 27 20.5%
  • I put no focus on floor support.

    Votes: 48 36.4%
  • Other.

    Votes: 4 3.0%
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