How much of MgSO4 (in grams)/470,000,000 mL = 100ppm

Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
Pool Guy 75
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How much of MgSO4 (in grams)/470,000,000 mL = 100ppm

Postby Pool Guy 75 » Tue 22 Jul, 2008 20:20

How much of MgSO4 (in grams)/470,000,000 mL = 100ppm

I'm trying to increase my Pool water hardness by adding magnesium sulfate I'm not sure If I have to add 140 grams, 210 grams, or over 380 grams to increase hardness up to 100 ppm from my original hardness level of 130 ppm.


chem geek
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Postby chem geek » Wed 23 Jul, 2008 03:27

Why in the world are you trying to increase Total Hardness by adding Magnesium Sulfate? It is Calcium Hardness (CH) that matters with regard to protecting plaster surfaces -- saturation of calcium carbonate is what matters, not magnesium. You increase CH by adding Calcium Chloride and can use The Pool Calculator to calculate dosages.

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