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Old 03-17-2012, 04:59 PM   #1
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I'm in my 3rd week of cycling and have noticed a dozen or so very small brown dots develop on the sand and rock? What are they? Is it normal?

I don't think it is a water quality issue. Im using only RO/DI

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Old 03-17-2012, 05:22 PM   #2
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Just looks like diatoms. Normal for the end of the cycle it will go away on it's own.
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