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Old 06-21-2013, 08:20 PM   #1
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sand turning black

I used pool filter sand as my substrate. And its starting to get a black color developing on it. Is this normal? Is there anything to do to fix it?

125 Gal Fresh Water
75 Gal Saltwater FOWLR
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Old 06-21-2013, 11:20 PM   #2
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Maybe BBA? How long are your lights on?

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Old 06-22-2013, 02:03 AM   #3
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Have any pics of it?
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Old 07-03-2013, 03:54 AM   #4
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I used play sand in mmy 20 gallon when I first started saltwater and I had black patches. All my fish died. :/ never found out what it was but did decide not to use tht type of sand again.
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Old 07-06-2013, 05:10 PM   #5
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I was told long ago it was due to silicates in the pool sand breaking down. I've never used it though so that's just what I was told.
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