20g swap to 29g: is this a problem? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 09-29-2008, 04:00 PM Thread Starter
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20g swap to 29g: is this a problem?

I currently have a pretty new (~ 1 month) 20g long planted tank. It has already cycled and currently houses 5 red-finnned tetras and 4 otocinclus. It has sand substrate.
Yesterday i picked up a 29g tank from a friend, and I was thinking breaking down my 20g long and putting it in the 29. I dont have very many expensive plants right now, and can carefully pull them out of the substrate without breaking roots.
Does anybody see any problems with me doing a transfer into a bigger tank? Thanks for your time.

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post #2 of 3 Old 09-29-2008, 04:12 PM
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You might go through a mini-cycle when you upset the substrate and move everything over to the new tank. Try to keep the substrate wet and the filter media wet to minimize issues. Keep an eye on water parameters after the move just in case you need to do an emergency water change.

Then again, you could avoid all of these problems entirely by keeping the 20 long and just setting up the 29g as a second tank...

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post #3 of 3 Old 09-30-2008, 02:00 AM
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Are you planning to move the filter from the 20 gallon over to the new tank? If so, it shouldn't be too much of a problem. Most of your bacteria lives in the filter anyway. Keep the 20 gallon running, set up your 29 gallon, then when you're ready just move your filter and fish over. I did this when I upgraded from a 20 gallon to a 55 and never saw a mini cycle. And I used all new substrate (except I did use a couple handfuls of the old gravel). I moved over my old filter plus added another filter since the new tank was much larger. My old filter was only off for about 10-15 minutes so no damage done. Test your water parameters every day for a week or two and don't add any new fish for a few weeks just to make sure it's stable.

If you want to keep the 20 gallon running also with the same filter use some of the filter media to jump start the cycle in your new tank.

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