I think seneye just spoiled everyone by reading nh3, and out to thousandths ppm and by being consistent across reef samples.
If I'm not mistaken that Idip was hundredths ppm max read as nh4/requiring the guess conversion step/ factoring pH and temp to get to nh3 for the end user.
*not that seneye has been decoded yet as the all-consuming accurate nh3 tester that's for sure/it's pH readings are often highly suspect and I'm not sure how they derive nh3 as accurately if they're not using the onboard temp and pH inputs...but what remains is seneye reporting in the .00x thousandths ppm nh3 across scrolls and scrolls of full running reefs, consistently, which matches the known cycling timing and consistency we know to be present in reef tanks piling rocks and swirling warm water quickly across them.
with api/any other ammonia meter in a lot of 1000 samples, only six read zero ammonia lol, 900 read .25, and 94 read .5-3ppm and all the reefs in the sample were cycled just fine and not in ammonia distress whatsoever and would read thousandths ppm on a seneye.
even if seneye's bottom line reading isn't exactly right, it's reporting the natural consistency in ammonia control that piled up rocks of high surface area certainly lend for reef tankers. seneye supports and upholds updated cycling science, api and red sea in the hands of res publica always doubt updated cycling science.