Hanna vs Red Sea Nitrite Testing

psumms

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Hi all, nearing the end of the cycle on a new tank. I have a Hanna Nitrite ULR tester that to-date won't give a reading as every test reports '200' (out of 0-200 ppb range). My Red Sea Nitrite tests are coming in between 0.5 and 1 ppt. I believe I should trust the Hanna (non)reading, but that's quite a difference, no?
 
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psumms

psumms

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Not sure that answers the question? Surely that would be a reading of 50-100 ppb on the Hanna if the Red Sea tests were anywhere near accurate?
 

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