The Planted Tank Forum - View Single Post - cycling a filter in an established tank?
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Old 01-24-2013, 10:42 PM   #5
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Honestly there is very little bacteria in the water column so there is no need to transfer the old tank water to the new tank. Transferring rocks and substrates to the new tank is the better solution. You should run the 2nd filter about a month to get it seeded. Always check for water parameters after moving things between tanks.
EHEIM #525
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