I see
even still, what about the adulterants listed/ the need for daily rising vs holding? how are we pressing down accuracy of the reported sample even if a check against ro/di shows hard yellow zero
in the linked thread we would be basing our cycle completion not on submersion times or associated life forms adhered to surfaces but on test kits, and that would make each aquarium not ready by day 30, and we'd have reported losses.
but each one is ready by day 30 or when the stuck-on animals behave correctly over time...
The biology of tank cycling has been known a long time already, that's why all google cycling charts/millions use the same time frame where ammonia complies requisitely with nitrite. ergo, know ammonia and know time, know nitrite (that's one reason we don't test for nitrite in the thread at all, though some still insist anyway)
we began accepting every stated ammonia reading as accurate without verifying accuracy or context of the test (wastewater testing vs full water change, post 30 days oxidation testing)
no chart ever shows ammonia rising back up after day 30, or holding, it was downward and then zero by a date in every case. testing varies so greatly we cannot rely on it to cycle tanks unless its a calibrated accurate seneye system, Id believe a digital ammonia reading to the hundred-thousandths yep.
If we need final proof this live rock system is cycled, then change out all the tank water where we know its zero free ammonia.
take reading, this is new baseline zero.
spike w liquid ammonia to 1 ppm on the calibrated test
wait 24 hours, its back to the original setpoint.
That's the only way to referee a cycle as completed and there is no other way using titration kits or ten different people on the same sample w post ten different results
( I smell an article idea, mail out lab verified ammonia samples here have 10 people test on their system

)