Is this algae?

Pinkfrost001

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My clove polyps have a weird growth of string black substance at the base and on the rock below. First time noticing it on the coral. Is it some type of algae? I made them angry to try and get a good photo of it.

DA38A810-7E00-416C-AF34-292001583357.jpeg
 

vetteguy53081

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Surface /film algae
Reduce white light intensity and add snails such as:
Turbo grazer
Astrea
Nerite
Trochus
Nassarius
And pin cushion urchin

Is tank at or near a window ?
 

Algae invading algae: Have you had unwanted algae in your good macroalgae?

  • I regularly have unwanted algae in my macroalgae.

    Votes: 44 35.2%
  • I occasionally have unwanted algae in my macroalgae.

    Votes: 27 21.6%
  • I rarely have unwanted algae in my macroalgae.

    Votes: 9 7.2%
  • I never have unwanted algae in my macroalgae.

    Votes: 10 8.0%
  • I don’t have macroalgae.

    Votes: 31 24.8%
  • Other.

    Votes: 4 3.2%
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