Southern Association of Colleges and Schools Commission on Colleges. Bob Jones University is a candidate for accreditation with the Southern Association of Colleges and Schools Commission on Colleges to award associate, baccalaureate, masters, and doctorate degrees.
hthÂ® calcium hardness increaser, 4 lbs. hthÂ® calcium hardness increaser, 4 lbs., is used to raise the calcium hardness of swimming pool water. Low calcium hardness may cause the pool water to be corrosive, resulting in damage to pool surfaces and equipment.
%20CCR.PDF. (Note that total hardness is reported in ppm CaCO3, while calcium and magnesium are reported in ppm calcium and ppm magnesium. In this example, magnesium contributes about 16 % of the total hardness and calcium contributes about 84 % of the total hardness.) This is just from your fill water, and the levels will be different based on what chemicals have been added, such as calcium chloride, calcium hypochlorite etc.