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.
Maintaining Pool Calcium Hardness. To keep pool water balanced, calcium hardness Is one of the most important levels to maintain. Calcium hardness, is the measure of how hard or soft your pool water is, and measures how much calcium is dissolved in your pool water. I explain calcium hardness in more detail in our swimming pool glossary.