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Old September 9th, 2013, 09:01 AM   #5
robertprice
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Join Date: Sep 2009
Location: Chelsea
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Default Not Sure

Actually, free copper can kill cyanobacteria (Copper Treatments For Dugouts), but I can't be sure it was cyanobacteria. It was very rose colored, and coming out of the one rock with a coral frag on it. The tank was also getting some direct sunlight so I added a background. Whatever it was, it raised my nitrates a lot. It's water under the bridge now, as the rock is gone and so is the stuff, and the fish are healthy.
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