Is it possible my tank cycled in a week!?

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Do you have anything in the tank to produce ammonia and in turn nitrite->nitrate?

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zeros across the board sounds wrong. Might want to re test amm, nitrite, and nitrates. make sure to shake all the bottles really good before you put them in the test tube. Hopefully you didn't get a bad test kit. 20 feeder should be good but you may have introduced some bad stuff to the tank. Feeder are usually unhealthy diseased fish.
 
zeros across the board sounds wrong. Might want to re test amm, nitrite, and nitrates. make sure to shake all the bottles really good before you put them in the test tube. Hopefully you didn't get a bad test kit. 20 feeder should be good but you may have introduced some bad stuff to the tank. Feeder are usually unhealthy diseased fish.
Hmmm... Ill give it a go tomorrow. I hope there were no issues with the feeders


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20 feeders should produce plenty of ammonia. Watch for spikes for the next week or so, I would still give it time. Something doesn't seem right - even if your ammonia reads zero accurately I can't imagine there is enough built up already to handle a large bioload. The chances of introducing anything harmful to fish in your tank by simply cycling with feeders is low - I would just remove them when you put your desired fish in there.
 
I'm repeating myself from an earlier post elsewhere but, yes, your tank is cycled. Having zero ammo and nitrite, in a tank that has had ammo introduced, means that you have developed the two nitrifying bacteria (Nitrosomanas and Nitrobacter). However, "cycled" is a relative term. It is cycled to the point that it can sufficiently convert the amount of ammo you've been "feeding." But what you're trying to achieve is a colony that can convert the amount of bio you aim to feed. If you threw an 8" pleco in there right now, you would be plagued with spiking ammo and nitrite in the coming weeks, guaranteed.

As far as the idea that "nitrates have to be present" in order to gauge cycling, this is nonsense. I have a 125G that has not had a reading of nitrates since it was finished cycling 5 months ago. I have two 6-8" pleco, six growing SA cichlids, and another ~dozen dithers and bottom feeders. The existence of nitrates has more to do with insufficient bio-media paired with ridiculously high turnover rates IMO.
 
20 feeder fish. Should I put ammonia in it?


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Technically, the fish convert protein in food to ammonia, (since protein includes nitrogen and nitrogen converts primarily to ammonia, thus the fish excrete/exhale ammonia). If you are feeding the feeders with food that has protein, I'd expect some buildup of nitrates since the nitrites are near zero. You don't have any plants or something like purigen in the tank do you? You are feeding the feeders with food that has protein, right?

:confused:
 
^It's a 120 with a sump and 20 feeders. He will not see nitrates for months, unless he adds a monster.

It would help to know what he's running for media though.
 
Okay so in the sump I hve a layer of standard filter floss, under the floss is a layer of carbon, under the carbon is my bio balls, from there it gets pumped back into the tank.

I do feed the feeders daily with a mix of plecco food and my cichlid gold plus that I normally feed my pbass with.

I'm getting ready to do some alterations to my sump and ill do a water change with it as well as re-test for everything


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