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post #13 of (permalink) Old 01-05-2012, 03:58 AM
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Join Date: Jan 2011
Location: Austin, Texas
Posts: 749
Did you leave any old filter media in the old filter? If not, then you may throw the 10 gallon into a cycle. If the old cartridge is sitting in the new tank with no filter/oxygen/airstone then a lot, if not all, of the beneficial bacteria will start dying. Don't forget to throw some flake food in the tank so the bb's can feed on it... starving bacteria = dead bacteria.
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