How long does media have to be in a cycled tank b/f seeding a new tank?

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fishies123

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Hi. I've asked similar questions before, but this seems like the best place to bring it. I'm not sure if anyone really knows a concrete answer or if different people just have different experiences, but after a tank is already cycled, if you want to start a new tank so you put some extra biological media in the current tank, how long does it have to stay in there before it develops enough bacteria to help seed a new tank? I hear different things. Some people have told me that it's the same amount of time as it takes for the very first sponges to cycle initially, which is up to eight weeks. Other people tell me that if you put it next to a sponge with developed bacteria on it they will multiply and it might be ready in two weeks.
 
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fishies123

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That was very helpful, thank you Aquarist!
 
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Meenu

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I would agree with Ken, I think a month (the longer the better, right?)
 
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Morgan111

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I've learned to take the least ammount of time you should wait and then double it.... because .longer is better... imo
 
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