HTH 52047 Swimming Pool Care Salt Shock, Stabilized Chlorinator, 1 dose Treats 10000 gallons, 5x12oz PacketsBrand: HTH Features: IDEAL FOR SALTWATER POOLS: This dichlor based product contains 56% available chlorine and works best with salt chlorine generators. Let this concentrated formula remove contaminants and algae for crystal clear pool water. EASY TO USE: Shock weekly to prevent 90% of pool water problems, based on the most common pool problems. Prevention is better than cure! This product does not damage your generator and is compatible with all pool