tank re-do: can I keep biofilter active with no fish? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 08-06-2010, 08:47 PM Thread Starter
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tank re-do: can I keep biofilter active with no fish?

Hi,

I'm doing a gravel swap and tear down in a 20gal tank. The Eheim canister is well established.

I'm doing a complete gavel swap and re-do. I plan to move inhabitants to a different tank for the switch.

What can I do to maintain the biofilter in the canister while there are no fish in the tank.

Thanks,
growitnow
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post #2 of 7 (permalink) Old 08-06-2010, 09:18 PM
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How long is it gonna take you?
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post #3 of 7 (permalink) Old 08-06-2010, 10:39 PM
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Put the filter on the tank the fish will be in until you are ready to put it back on the tank with the new gravel.
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post #4 of 7 (permalink) Old 08-06-2010, 11:50 PM Thread Starter
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Hi,

Sorry I should have mentioned - Its probably going to take a couple days.

Good idea of putting canister on 'other' tank - but part of the re-do is reconfiguring I/O in the 20gal (more than just moving location of I/O tubes). I'd prefer to let the established filter run in the empty but re-done tank,..if there is a way to limit kill-off of biofilter.
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post #5 of 7 (permalink) Old 08-07-2010, 12:17 AM
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Quote:
Originally Posted by growitnow View Post
Hi,

I'm doing a gravel swap and tear down in a 20gal tank. The Eheim canister is well established.

I'm doing a complete gavel swap and re-do. I plan to move inhabitants to a different tank for the switch.

What can I do to maintain the biofilter in the canister while there are no fish in the tank.

Thanks,
growitnow

Just feed the tank as you would when there is fish.
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post #6 of 7 (permalink) Old 08-07-2010, 01:19 AM
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My advice to you would be same as that of aGiantLeaf, just go on feeding the tank as if the fishes were still there. Using this method you will keep your tank cycled indefinitely.

If you have a choice, you have a problem, till you elect your choice. No choice, no problem, only consequences, learn to live with them.
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post #7 of 7 (permalink) Old 08-07-2010, 04:03 AM
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Nitrifying bacteria grow on all surfaces exposed to the water, in the tank, in the filter, in the filter hoses, on the substrate, the plants, the rocks, etc. Even if the bacteria in the filter are lost you still have the colonies on everything else. And, if the tank is then heavily planted ammonia won't be a problem anyway.

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