Just to help me stay honest here on the "math"... If I have 7.5gal of water in total and add 3tsp of gypsum at 4gm/tsp and 3tsp of CalciumChloride at 3.4gm/tsp this would give me roughly Ca.197ppm, SO.235ppm, Cl.172ppm with the gypsum contributing Ca.99,SO.235 and CalciumChloride contributing...