Amazon.com : Pro Water Hardness Test Kit - Quick
The test strips arrived today. They are simple to use. Dip in water for a second & remove. Shake off excess water & hold strip for 30 seconds . Compare reading to color chart on bottle. They just simply don't work. The color changed from the soft water color of sea green to a light to medium brown which showed the hardness to be between 50 ~ 120 .
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