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Old 22nd March 2014   #1
BinaryRun
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Default [Cycling] When will the nitrites fall?

Hi guys,

For the past 5 days my nitrites have been sky high. (+1ppm on my liquid tester, off the chart) When can I expect it to lower? I'm already seeing nitrates, however I understood that high nitrites do affect nitrate tests, but in any case the nitrates show as 30-40ppm.

As for ammonia (Using Janitorial Ammonia to dose) it lowers from 4ppm to 0ppm within 24 hours currently. Should I keep adding?



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Old 22nd March 2014   #2
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Default Re: [Cycling] When will the nitrites fall?

Yes, keep adding the ammonia.

Nitrite is the first stage of the cycle, nitrate second. So your ammonia is being converted as required, it's just taking the nitrites-to-nitrate bacteria a while to catch up. Keep at it.

How long have you been cycling the tank?



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Old 22nd March 2014   #3
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Default Re: [Cycling] When will the nitrites fall?

13 days, so it's going pretty fast.



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Old 22nd March 2014   #4
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Default Re: [Cycling] When will the nitrites fall?

Would it be a bad idea to not add ammonia for a day and leave it at 0ppm? Just to see if the nitrite is within readable levels tomorrow.



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Old 22nd March 2014   #5
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Take auntiejudes advice and keep adding the ammonia until the cycle ends.


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Old 27th March 2014   #6
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Default Re: [Cycling] When will the nitrites fall?

Been doing it so far. It's now about 8/9 days into the nitrite spike without any drops. When can I expect it to lower like it did with the ammonia?



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Old 27th March 2014   #7
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It's gonna be awhile. Could take months. What is the ammonia and nitrate reading?


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Old 27th March 2014   #8
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Default Re: [Cycling] When will the nitrites fall?

Could be months? Everything I read says 3-4 weeks max total and I'm almost 3 weeks in. (Going faster due to using pure ammonia)

Ammonia drops from 4ppm to 0ppm since the past 8/9 days (since nitrite spike started). Nitrate has been a constant 30/40ppm, however I understood that high nitrite can give false nitrate readings with liquid tests.



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Old 27th March 2014   #9
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Default Re: [Cycling] When will the nitrites fall?

It can sometimes take more than 4 weeks yes but that's about the average time. It sounds like you're very nearly there.



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Old 27th March 2014   #10
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Default Re: [Cycling] When will the nitrites fall?

Great! I also just remembered that my tank came with a heater, so I just installed it to raise the temperature from 68 degrees to 84. Since I heard that it will help fasten the grow of the bacteria. Of course I'll take it out as soon as the cycling is done =]



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