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Old 06-19-2012, 08:07 PM   #11
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I change my carbon out every 2 weeks I run BRS ROX.08 after about 2 weeks bacteria can start to grow in the GAC and if you change it out all at once it can shock the tank, just like taking rock out. GAC has a lot of pores so it can grow a lot of bacteria. If you go a month or more I would only change out half. I also change my GFO every 2 weeks

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algae, identify

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