Purple bubble algae?

bstaton

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does anybody know what this is or if it’s harmful? It’s hard to tell from the picture but it’s purple in color. If it is harmful I would appreciate it if someone could tell me how to get rid of it.

IMG_1373.jpeg
 

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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