I tested my tap water and the GH level was going so high that I had to abort the test. The type of test kit is the kind where you put drops of solution into the sample and count the number of drops it takes for the water to turn green (1 drop = 1 dGH). Well, after 45 drops the water was still nowhere near green (dark yellow/gold). I know the tap water around here is hard but this is ridiculous. Something isn't right. The only thing I can figure is maybe the test results are eroneous since the test kit is 5 years old, but I didn't think these test kits have a shelf life.