Ok so a bit of an interesting update on the whole nitrite testing issue I raised. So not knowing the nitrite concentration Dr. Hovanec used in that YouTube video was really starting to bug me. So I decided to leave comment on the YouTube site asking for the nitrite concentration he used in his experiment and his view on the starting point for the level of Nitrite that would be required to result in a false zero reading. Much to my surprise I received an answer in less than 24 hours. Here is the response that I got from him (or at least a DrTimsAquatics representative)
The concentration was 30 mg/L nitrite-nitrogen.
The value were kits begin to give false reading is generally anything above the maximum value on their scale. But the scale is different for each kit.
For verification purposes this is on the public comment section of the YouTube video.
Since his concentration is based on the nitrogen scale it needs to be converted to the ion scale. So if my math is right this would be equivalent to a reading of 98.5 on an API test or any other ion based test. Talk about a cycle gone wrong!!
I guess I would have preferred if the sample he used contained a concentration closer to something we would expect to see during a cycle. It would have made his point much stronger!
I have an email into Mars/API but haven't heard back yet. I will post the response if I get one.