in this video you can know the difference between TDS and Hardness in water, and how to check water hardness and TDS in correct method
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Difference between TDS and water Hardness/टीडीएस और पानी की कठोरता के बीच अंतर
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in this video you can know the difference between TDS and Hardness in water, and how to check water hardness and TDS in correct method
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