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.
Water is softened by removing the hardness-producing ions, or specifically, the cations of calcium and magnesium. In the ion exchange reaction, sodium is substituted for hardness ions. There is no graded gravel bed to buy, transport, handle at the job site, and install.