For all of them you want to start with 5 ml of water in the test vial.
PH- you put 7 drops in the water.
ammonia- put 14 drops from first bottle, shake gently, 7 drops from the 2nd bottle, shake gently, and add 7 drops from the 3rd bottle, shake gently, allow 20 minutes for color to develpoe
nitrite- add 7 drops from the 1st bottle, shake gently,let the vial stand for 10 seconds, add 7 drops from 2nd bottle shake gently, allow 2-5 minutes for color to develope.
nitrate- add 14 drops from the 1st bottle, shake gently, add 7 drops from the 2nd bottle, shake gently, using the enclosed dosing spoon add 1 spoonful of the powder, close vial and shake well for 20 seconds, add 7 drops from the 3rd bottle, shake gantly, allow 10 minutes for color to develope.
HTH