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Discussion Starter · #1 ·
I know this should be easy but I seem to have messed things up some how. I'm cycling two tanks at the moment and the past week has given me some strange readings.
My one tank had 0.25 ammonia high nitrites and high nitrates then suddenly the nitrates disappeared to nearly nothing and nitrites are still high. What's gone wrong and can I fix it?i tested the other tank this morning , And it's nitrates have also disappeared :(

And yes. Did shake the bottle .
 

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Yeah, that happens. I think the nitrite-eating bacteria (nitrospira) have a hard time getting established and will give spurious nitrate readings. How high is your nitrite? Are there fish in those tanks?
 
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