O-ACE-sis Granule Cal-Shock 1 lb

Cal shock contains 68 percent active ingredient. Convenient and fast dissolving. Economical effective sanitizer. The available chlorine (65 percent) is released when the product is dissolved in water. Shock treatment used for shocking or super chlorinating pool water to destroy organic contaminants and clear up hazy water.
Long lasting
Low cost and easy to use
Works continually to kill bacteria
Self stabilized preventing sunlight from degrading the chlorine