I've cycled many tanks using pure ammonia, and I've always waited to add (second) dose of ammonia until it reads 0 with the liquid test kit...hope it's OK to post the following, from another forum, and I would like your input on these directions, @Essjay:Good, you're on the way
Now you need to test for ammonia and nitrite every third day until you reach a day where ammonia is less than 0.75 and nitrite is more than 2.0. Don't add any more ammonium chloride until then.
We don't advise that now.Ammonia is only redosed when previous dose has dropped to 0 and only one time a day.
If at any time after the first ammonia addition (Dose #1) you test and ammonia is under .75 ppm and nitrite is clearly over 2 ppm, it is time to add more ammonia
In other words, add the 1/3 dose when there is zero ammonia and zero ammonia again two days later.adding 1/3 of the full dose when you get two consecutive every other day ammonia test readings of 0 ppm
when another 3 ppm dose is added.ammonia is .25 ppm or lower and nitrite is clearly under 1 ppm,