Blue Horizons Granular Shock 5kgA traditional shock treatment product, these calcium hypochlorite granules have an available chlorine level of approximately 65% making them a good chlorine donor for pool water problem solving. Pool Volumes Granular Shock to increase level by Litres Cubic Metres 1mg L 5mg L 10mg L 4,545 4. 55 7g 35g 70g 11,364 11. 36 18g 88g 175g 22,727 22. 73 35g 175g 350g 45,455 45. 45 70g 350g 700g