you have to follow the tests to a T. if it tells you to mix it, then let it sit for 5 minutes then read, do exactly that. any color change or variation outside of the intended time frame isnt accurate or worth mentioning. as for the supposed ammonia being gone after a week, check the water you are putting into the tank.... if theres ammonia present in it, then thats your problem. its also worth mentionins that if you have a rodi
system that is correctly installed and has the proper filtration cartridges in it, theres no reason you should be seeing ammonia in your new water.