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.
Measure the calcium hardness in your pool water using a reliable test kit. If calcium hardness is below 200 ppm use the table below to determine the correct amount of Calcium Hardness Increaser to use. Pour Calcium Hardness Increaser into the deep end of the pool.