Fish less cycle complete? - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 09-03-2017, 08:26 AM Thread Starter
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Fish less cycle complete?

I have cycled a 64litre tank using ammonia, having read several articles I was expecting a spike in nitrites this never happened! I kept levels of ammonia at 4ppm but nitrites don't seem to have risen above .25 ppm when I have tested. The tank has been cycling for 2 weeks and I have also added filter start on a couple of occasions. Yesterday I added ammonia to 4ppm and within 24 hrs its at 0 ppm. Nitrates are at around 10 ppm.
My concern is whether there is likely to be a spike in nitrites at some point if I add my fish, 5 harlequins, 2 ottos and a few cherry shrimp.


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post #2 of 2 (permalink) Old 09-03-2017, 09:56 PM
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Off the top of my head I don't remember the exact details but if you are fishless cycling and using API test kits the nitrite is sometimes so high it is off the charts and doesn't register. I think the way you could tell was that the drops were a different color when you first put them in. Maybe someone else will know the exact details.

If you put in 4ppm of Ammonia and it is 0 today and Nitrates are at 10 the tank has cycled.
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