I had a bad container of carbon(was very old) do the same thing to my Lps...
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Red Coral Online Store 
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45 Gallon Cube with 10 Gallon Sump, Lighting 8 bulb T5, Vertex IN 80 Skimmer
-2 Occelaris Clowns, Engineer Goby, RBTA, Peppermint Shrimp
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