New tank - is my Nitrogen cycle established? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 15 Old 08-03-2013, 09:14 AM
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Quote:
Originally Posted by Tracy Bird View Post
My tanks run 0 nitrate which results in cyanobacteria.

Therefore I dose with Potassium Nitrate (dry fert) to 5.0 ppm which prevents the cyano.
Great tip, Tracy. Thank you.
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post #12 of 15 Old 08-03-2013, 04:23 PM
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Yes, I agree. To capture any of the beneficial bacteria, you need to extract some of it from filter media from the established tank. Water transfer alone won't work. It seems to help jump start the new tank cycling process for me, once the other factors are in play (e. g. ammonia source)
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post #13 of 15 Old 08-03-2013, 05:50 PM
Hey Jeff! I don't understand your statement about doing WC if the ammonia goes above 1 ppm. I don't remember where I saw it, but he instructions for fishless cycling said that you need to get the Ammonia to 4 ppm and keep it there until you get nitrite. I'm not arguing just trying to understand. Thanks.

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post #14 of 15 Old 08-03-2013, 06:56 PM
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Quote:
Originally Posted by avraptorhal View Post
Hey Jeff! I don't understand your statement about doing WC if the ammonia goes above 1 ppm. I don't remember where I saw it, but he instructions for fishless cycling said that you need to get the Ammonia to 4 ppm and keep it there until you get nitrite. I'm not arguing just trying to understand. Thanks.
The entire cycle, ammonia oxidizers and nitrite oxidizers, establishes at its most efficient rate when the ammonia, and ideally nitrite, are below 1ppm. The nitrite oxidizers remain dormant at levels of ammonia beyond that so, while 4ppm will work for the ammonia oxidizers it stalls the second stage of the cycle.

I was able to get a cycle established in 7 days, another member here managed 9 days using the same 1ppm guide and I talked to a waste water management tech, they set up very large scale cycles in 7 days as well. There is no reason to wait weeks and months to establish a cycle using high ammomia levels when just lowering that concentration produces a cycle that can take as little as 7 days.

The point is, a WC at 1ppm or higher just lowers the concentration and accelerates the cycle.

Jeff.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc
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post #15 of 15 Old 08-04-2013, 01:59 AM
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The ppm of ammonia is a matter of opinion and experience. I've cycled tanks in 10 days with 6.0ppm ammonia. The amount of starter bacteria effects the timing in that bacteria doubles every day or so. So achieving a cycle with a low ammonia-processing capacity should take less time.

If you're stocking shoals of fish at one time, I would think you'd want that capacity to be much higher, perhaps as high as 4.0ppm/day. Of course, if you're only stocking one fish and a shrimp, I guess less would do.

Last edited by Hallyx; 08-04-2013 at 02:02 AM.
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