HTH Sock It Pool Shock-N-Swim - 5 x 1-lb. bags NOTE: This item cannot be shipped to Alaska or Hawaii. If your shipping address is in Alaska or Hawaii, this item will be removed from your order. Contains 45% available chlorine Helps restore crystal clarity and softens your pool water Use as a shock treatment to kill bacteria and control algae Dosage: 1 to 2 lbs. per 11,500 gallons