I use the API (Aquarium Pharmaceuticals) GH & KH testing kit. The GH reading of 179 is ppm (parts per million) as is the KH of 89.5ppm. It took 10 drops to change color for the GH. So is the reading a 10 instead? Same for the KH, it took 5 drops to change color, is the reading a 5? Both both the...