Please help me identify what this is. It is growing on some of my live rock and some spots on the bottom of the glass. I started out seeing some spots but now definitely seeing more throughout the tank. It is a dark brown or black and very tough...looks and feels like a fuzz. Any ideas on what this is and how to get rid of it?
First pic is the substance scraped off with Coraline algae.
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First pic is the substance scraped off with Coraline algae.
Sent from my iPhone using Tapatalk
