Nitrite Cycle ahead of Ammonia?

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Scoot

Aquarium Advice FINatic
Joined
Mar 14, 2006
Messages
670
Location
Nebraska
My 75g tank (now fishless except for a small arrow crab and a plethora of brittle worms), in its 11th day, is still reading 8.0+ ammonia, but today nitrites have dropped to 0.25PPM (from a high of 2.0). I did a 30% or so water change yesterday, but after the change they were still much higher.

The water change hasn't affected ammonia at all (it must have been really high). Another 30% change coming later today to try and get that down.

My test kit seems accurate, still get the baseline 0.5 from the tap, and 1.0 from my quarantine tank (which is also due for a water change, but 10g is easy to manage).

Is it possible for the nitrite-eating bacteria to be ahead of the nitrite bacteria in a cycle?

Also, last week I did use ammo-loc and amquel+, is it possible that I'm reading residual non-toxic ammonia that's not being handled by bacteria? Or maybe the amquel killed off the nitrites...
 
You said you were in the 11th day of cycle. It will take 3-4 weeks to complete. So you still have time left. Be patient. Before you know it the cycle will be done.
 
Actually its the 13th day, not that it matters ;)

I was just surprised to see Nitrite drop so suddenly, before the ammonia.
 
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