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Wannabe Reefer

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Hi everybody. Cleaning out the filter in my external filter today I found this thing.

Any idea what it is and if I should add him back in order or flush it?

Thanks
IMG_20210409_124512.jpg
IMG_20210409_124516.jpg
 

High pressure shells: Do you look for signs of stress in the invertebrates in your reef tank?

  • I regularly look for signs of invertebrate stress in my reef tank.

    Votes: 42 31.3%
  • I occasionally look for signs of invertebrate stress in my reef tank.

    Votes: 31 23.1%
  • I rarely look for signs of invertebrate stress in my reef tank.

    Votes: 27 20.1%
  • I never look for signs of invertebrate stress in my reef tank.

    Votes: 34 25.4%
  • Other.

    Votes: 0 0.0%
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