Putting mature filter into new tank, how to do it?
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Putting mature filter into new tank, how to do it?

This is a discussion on Putting mature filter into new tank, how to do it? within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> My 11 year old daughter is setting up our 40l tank to keep guppies, this afternoon we filled it with water (conditioned) to settle ...

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Putting mature filter into new tank, how to do it?
Old 02-20-2011, 10:35 AM   #1
 
Putting mature filter into new tank, how to do it?

My 11 year old daughter is setting up our 40l tank to keep guppies, this afternoon we filled it with water (conditioned) to settle and warm up, it's a sand substrate and some live plants and am planning on transfering one of my spare fliters ruunning in my cycled tank into her tank as soon as we buy the fish so that the bacteria in it don't die off, can I expect it to cycle again with this filter? (It's been in with dirty puffers who have quite a high bioload)

Should we start with just a few fish then add some more in a few weeks time,or should we put in the 8 we plan to keep in this tank straight away as the bacteria in the filter have been used to a high bioload already?
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Old 02-20-2011, 10:39 AM   #2
 
I would play it safe and only add a couple fish at first and then test the water. If you do get an instant cycle then you can go ahead and add the rest of the planned stock. For insurance you could always add tetra safe start and add all the fish at once.
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Old 02-20-2011, 12:18 PM   #3
 
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Any fish tank needs time to cycle; the bacteria must appear, colonize and then multiply by binary division if there is "food" (ammonia, then nitrite) for them. The time it takes for this to occur varies from 2 to 8 weeks normally, and is dependent upon many factors.

Seeding a new tank with live bacteria helps "jump-start" the cycle, but cannot "cycle" it, per say. It merely gets the bacteria working faster. So, very few fish at first as the previous response mentioned is wise. Of course, the more seeding you do, the more fish it can handle, but to be safe I would only put in maybe 2 guppies, wait a day (minimum), then a couple more, etc.

Live plants also quicken the cycling, and the more the faster. Plants grab ammonia/ammonium very fast.
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Old 02-21-2011, 07:12 AM   #4
 
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When I started my 29g tank I used a piece of filter media that had been in my 15g tank's filter for a month. I started with just 4 Zebra Danios and the live plants for 3 weeks, and never had any ammonia. I slowly started adding the other fish over time, and the ammonia level was always zero.
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