HTH Super Granule Shock Treatment 6 lb. (Pack of 6)HTH Super Granule Shock is a powerful 4 in 1 pool shock that boosts chlorine levels while also killing and preventing germs and algae for a healthy and clear pool. Super Shock packs a tremendous punch, treating 13,500 gallons and restoring crystal purity in just 24 hours! Super chlorinate your pool with this pool shock as it is suitable for all types of pools and will not fade your pool liner. The practical and simple to use chlorine shock treatment