you dont have to concern over levels here, only # of days will matter and its fully predictable when the tank will be ready. Dr Reef has a bottle bac charting thread that shows when all major brands are ready
you'd add your bottle bac choice, a pinch of fish food per his thread, some liquid ammonia for cycling, and wait. what the interim readings state wont matter and aren't likely correct anyway unless we are looking at seneye digital readings for nh3
submersion time is key
let the mix stew 10-14 days, you can change water and it will support a reasonable start bioload. ~ten days is enough for all brands given some food boost and ramp time.
use of wet pack live sand also speeds up the process, but ten days is solid wait in today's bottlebac timeframes.
you will likely show nitrates at any time between now and then, further proof but we dont have to wait for ammonia to hit zero that can take sixty days on some testers...just the charted time for the bottle bac at hand is sufficient, and all were done by day 10-14 max insurance time needed.
no reef cycle can stop, stall, or fail to complete as part of the new cycling rules, that will be handy here. only the time axis of a common cycling chart is needed to tell us when ammonia is under control, that happens to be day 10 as well...
handy timing trick so that no cycle fails. dose a little more ammonia and input a pinch of feed then you'll be all set.