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.
Extra Rapid is a Portland Cement based product. 1  It contains calcium aluminate to give rapid setting and rapid hardening properties.2  Sets soon after placing and gains strength rapidly to allow normal services to be brought back into operation in a working day.3  Similar final strength to Mastercrete Original.xtra Rapid is a Portland Cement based product. 1  It contains calcium aluminate to give rapid setting and rapid hardening properties.