Add and wait is the best method.
What kind of ammonia have you got? You'll need to make sure it's just ammonia and water. Chelating agents are also okay.
Jeyes ammonia
is it jeyes kleen off ?
if so its good
Yes it is
Added the recommended dose about 4:00pm did a test following readings
Ammonia 8.00ppm Is this to high at this stage

?
Nitrite 0.25ppm
Nitrate 5.0 (ish)ppm
Read the article on this site... was very good
I didn't expect things to go as quick i.e nitrites Guess the ammonia works.. Need to re read the article and figure where to go from here