Reef Devils
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MAC of SW Florida
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Tan is about four months old now. I thought I just got over the ugly stage last week but I’m looking on my rocks and I see little areas with brown stuff on them. I am also seeing new spots that are dark brown on the sand behind the rocks. Also, on the back wall of my tank, I see this white stuff growing and some brown patches on the back. What could this be? Is that a problem h