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.
For shock treatment, use liquid chlorine, lithium hypochlorite, non-chlorine or dichlor, if the stabilizer level is not too high. Adding a calcium sequestering product is a good idea, if you calcium hardness level is above 200 PPM.