摘要：Sanitation of swimming pool by using tablets of neutral Ca (CIO)2 salt was studied. This tablet has 20 g weight, 30 mm diameter and about 16 mm height. The dissolving speed of tablet in pool water will be shown by next formula. [numerical formula] It was found that the theoretical values from the formula (3) and (3') were accorded experimental values. Residual-chlorine concentration will be calculated by next formula. The experimental value was accorded with the value obtained from the formula. [numerical formula] This tablets dissolved throughly in 2.5 hours, but some of them were disappeared in short time by dissolving of getting out of its shape. Some tablets were moved to other place at the bed of pool, but the concentration of residual-chlorine was held uniformly.
