What would this growth be?

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Brigitre

Aquarium Advice Newbie
Joined
Feb 16, 2014
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3
It is kind of red/brown and soft on the life rock. What could it be and how do
It remove it?ImageUploadedByAquarium Advice1392578337.340247.jpg
 
If it blows off, it is cyanobacteria. This indicates a nutrient issue in the water column. This can be addressed just like algae issues. 2 articles on this are located in my signature.
 
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