O.K. I see on here all the time where u all say my levels r at 0...I have a ammonia test kit, but the problem I have is u have to compare the color that the test tube full of the tank water against a color chart, and in every room of my house it reads a different color(due to the lighting)I can't tell if it is at 0 or .25...my question is, is there a test out there that will give u the readings in a numeric result...or anything easier that i can do?