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.
Fill a portion of the pool water capacity with softened water or order water to be delivered by a truck. Softened water, such as tap water treated by a water softener, will lower the hardness. Too much, however, will decrease the hardness to detrimental levels and necessitate a hardness increaser.