Duncan Coral Darkened on the bottom

brelson

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I've had this Duncan coral for about two weeks, and now I noticed that the bottom of it is darker. Has anyone experienced this problem before? What will be the cause of this? And what should I to do?

IMG_8080.jpeg IMG_8076.jpeg IMG_8079.jpeg IMG_8073.jpeg IMG_8071.jpeg
 

Ron Reefman

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What makes you think this is a problem?
 

Freshwater filter only or is it? Have you ever used an HOB filter on a saltwater tank?

  • I currently use a HOB filter on my reef tank.

    Votes: 50 25.3%
  • I don’t currently use a HOB filter on my reef tank, but I have in the past.

    Votes: 50 25.3%
  • I have used a HOB on fish only or quarantine tanks, but not on the display tank.

    Votes: 46 23.2%
  • I have never used a HOB on a saltwater tank.

    Votes: 48 24.2%
  • Other.

    Votes: 4 2.0%
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