Total Hardness Test กระดาษวัดความกระด้างของน้ำ

Calcium and Magnesium are naturally occurring minerals responsible for water hardness.
Hardness is a key water chemistry parameter and its control is important to help assure
proper water quality. Low levels of calcium and magnesium (soft water) can contribute to
problems of corrosive water. High calcium and magnesium levels, especially above 400
ppm, can lead to possible water clarity problems and scaling. There are various
commercially-available softeners that can help minimize the problems associated with
high hardness levels. Hardness levels can be determined by using a simple dip and read
strip. Levels are standardized as Calcium

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