No, sorry, miscommunication. What I was trying to say was that the ideal ammonia dosing pattern for add&wait I believe is where (after you are past the early week or weeks when you're waiting for ammonia to just drop to zero) ...anyway after that when ammonia starts pretty much dropping within a day, that your pattern is to confirm (via a test that occurs during the day) that ammonia has indeed dropped to zero ppm and that when you reach your normal time of the day to do your "add" that you then add ammonia back up to 4 or 5ppm. That time of day is ideally always the same time of day, say 7AM or 7PM or some such that's convenient for you but is pretty much a fixed time. So the important point is that the big dose of ammonia is pretty much the same amount at pretty much the same time each 24 hours, setting up a bit of a rhythm day after day, which I believe just helps the reading of the results down the road to be easier, nothing more than that. I mean I don't know that the bacteria particularly care, as all we know of as important to them is that they regularly see a dose of ammonia that's less than 7ppm or so and that they have available surfaces and temp and pH.
OK, so seeing "zero ppm" ammonia each day within the 24 hours is ideal and pretty common, BUT, we sometimes seem to have these cases where people put in the big dose, 4 to 5ppm, and it rapidly drops during the day but then it seems to somehow still show up as a "trace"... a tiny little bit of green or something, say, on the api test... and we'll see them then wait, sometimes for several days, for it to reach true zero ppm before they re-dose the ammonia. Now, in my mind, I'm just not sure what's going on in those cases, whether there's some legitimate thing where the tank ammonia is really not getting down to zero, or whether somehow the color is just interpreted wrong or what the heck is going on. But in those cases I tend think the cycler should just go ahead and add ammonia, even though I -usually- tell people to try and be patient and really wait for it to be zero. In other words, I think there's a difference between somebody who's too impatient when ammonia has only made it down to 1ppm or 0.5ppm (they really -should- wait) and somebody who has it go right down to a tiny trace that hardly looks dark enough for 0.25ppm (-those- people should just recharge with ammonia!)

I hate it when it takes me so many words to describe a pretty simple thought but I guess I'm just not that good of a writer! Anyway, hope you followed my thought...
~~waterdrop~~