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Ianwp 04-09-2014 01:19 AM

Cycle new tank with seeded media
I have a friend who is getting into fish keeping, and he wants to seed his new mechanical filter in my cycled tank. i was wondering how long it would take for a new filter to get enough bacteria to be good to cycle his tank. My tank is a 55 gallon, and he has a 15 tall with an aquaclear 70. So he gave me an aquaclear 70 mechanical filter, nice big filter. I have it soaking in my tank since my canister is full.

How long should I leave it in the tank to get bacteria in the sponge?

Should I move stuff around in my canister and put the sponge in there instead?

I also have a piece of driftwood I could spare, at least to lend to him til his tank is cycled, would this help to cycle his tank? its probably 8 inches long by 2 wide.

Flint 04-09-2014 07:15 AM

The driftwood won't help much but running the filter on your tank, I'd say about two weeks. I would run the filter and put the sponge in your canister.
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Ianwp 04-09-2014 11:01 AM

K thank you I also removed a filter pad I had in the canister already and put it in his hob, hopefully that will get it started, he is dosing ammonia.
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Flint 04-09-2014 11:45 AM

The filter pad from your tank alone will be enough, honestly. He can have the filter now.

jaysee 04-09-2014 12:05 PM

Cycle new tank with seeded media
Agreed. If it's not 100% instantly cycled it will be very quickly.

Crazyfish 04-09-2014 01:36 PM

I'm not so sure about "instantly" cycled. I think it still takes time for the tank to go through the cycle as the bacteria has to occupy all parts of the tank and not just the filter. Even if you take a filter from a cycled tank and place it into a new tank, there will most likely still be bacteria blooms as the bacteria will quickly multiply to occupy the space so there may even be some cloudy water periods. I would say anywhere from days to 2 weeks.

jaysee 04-09-2014 01:48 PM

Cycle new tank with seeded media
I've started a dozen tanks by instantly cycling them with seeded media. Never once have I had a bacteria bloom. It's really important to add enough seeded media to handle the bioload of the new tank, otherwise you will have a mini cycle. The bacteria does not need to colonize all the other places that it will colonize in order for the tank to be cycled. That's how lots of people operate their quarantine tanks.

Taking media from a 55 to seed a 15 gallon tank is easy. Seeding a 55 from a 15 is not as easy. Some common sense is needed when stocking a larger tank started with media from a smaller tank.

Flint 04-09-2014 01:52 PM

I would disagree, in my opinion, the bacteria in the filter are the most important. Hence why if you remove the filter, the tank will crash without water changes to remove toxins. The tank surfaces can harbor nowhere near enough bacteria to support livestock.

jaysee 04-09-2014 02:24 PM

The bacteria in the filter and the bacteria in the substrate work together to provide 100% filtration. With no substrate, that 100% will be in the filter. With no filter, that 100% will be in the substrate. With a filter and substrate, it's split. What's the split? Depends on the filter, IMO. I believe more surface area in the filter means a larger portion of the bacteria colony will live there, due to being force fed by the pump.

Ianwp 04-09-2014 05:00 PM

As a backup, I am giving him a sponge I got from angelsplus to help cycle my tank. It has a lot of build up waste in it, do I clean it out first by squeezing it in tank water, or is that the stuff he needs to squeeze out in his tank to cycle? Thanks again.
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