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Old 08/29/2013, 10:43 PM   #20
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Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,271
I am not able to identify dinoflagellates, even with a microscope, so I can't help you there. Looking at the picture, I wonder whether the problem might be more bacterial in nature. That'd explain why the dark period didn't help. Did you block light to the tank completely?

Jonathan Bertoni
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