What are these all over my tanks glass

IKD

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Picture from @ZaydRossi

These look like hydroids. Harmless and tend to disappear over time on their own

E7D9FD7F-E01D-4C45-8384-3EF157B8EB5A.png
 
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ZaydRossi

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Helpful link…

Thanks mate they are 100% hydriods, Cheers for your help
 

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: 54 25.1%
  • I don’t currently use a HOB filter on my reef tank, but I have in the past.

    Votes: 53 24.7%
  • I have used a HOB on fish only or quarantine tanks, but not on the display tank.

    Votes: 52 24.2%
  • I have never used a HOB on a saltwater tank.

    Votes: 52 24.2%
  • Other.

    Votes: 4 1.9%
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