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 ?
 

When to mix up fish meal: When was the last time you tried a different brand of food for your reef?

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  • I never change the food that I feed to the tank.

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