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post #1 of 3 Old 03-15-2012, 01:40 PM Thread Starter
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Question Help cycling with established tank water

I have a 2 gallon tank (no fish or plants) that I got an hour ago. I heard that it is possible to cycle a tank in a day with water from an old tank. I filled the tank halfway with water from a 35 gallon that is cycled. The rest was regular treated water. They use different media so I can't use the big tank's media. I have bacteria that you buy to cycle tanks that I added. Is this all I need to do? Am I done?

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post #2 of 3 Old 03-15-2012, 02:35 PM
The Opry ain't over till the fat bacteria sings!

First, the beneficial bacteria is attached to [filter] media, substrate and decor, not the water column.
You might have some advantage with the bacteria in a bottle product (some are great, others not so much), but even with that, there is a process to establish nitrosomonas and nitrobacter bacteria colonies with sufficient numbers to take care of ammonia and nitrite bidness.

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post #3 of 3 Old 03-15-2012, 02:50 PM
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Yeah, I'm afraid using old tank water will only result in you having Nitrates in your water.

Regardless, i think you'll have a surprisingly hard time keeping a stable cycle in 2 gallons anyways.
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