480008 Total Hardness Test Paper kit ¡ÃдÒÉÇÑ´¤ÇÒÁ¡ÃдéÒ§¢Í§¹éÓ ªØ´·´Êͺ¤ÇÒÁ¡ÃдéÒ§ ¢Í§¹éÓ > ªèǧÇÑ´¤èÒ¤ÇÒÁ¡ÃдéÒ§ 0 - 1000 ppm (mg/l) ÇÑ´ä´é 50 ¤ÃÑé§ 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 readstrip. Levels are standardized as Calcium