Check the listing for details. BioGuard Burnout 73 - 1 lb - 6 Pack. Condition: New. Listed at 65.94 USD. Burnout 73 - A super-chlorinating swimming pool shock! It has BioGuard's highest percentage of calcium hypochlorite at 73%. BurnOut 73 shocks, oxidizes, and clarifies your pool all in one. Pre-measured into one pound bags, this quick-dissolving calcium hypochlorite shock kills bacteria and bather contaminants to provide a safe and clean swimming experience. A one-pound bag treats 16,500 gallons! can be used once per week with one of our three step BioGuard programs. Product Benefits: Patented Technology 73.0% Calcium hypochlorite Multifunctional Formula: shocks, clarifies and oxidizes Can be used with vinyl and plaster pools Comes packaged in 1 lb. bags Restores water sparkle Keeps water clean and sparkling Easy to use No measuring or mixing Removes chloramines and other water soluble compounds from pool water Convenient pre-measured bags Weekly use makes your water sparkling clear Kills bacteria Super-chlorinates Dosage: When the pool is not in use, broadcast Burn Out 73 directly into the deep end of the pool with the pump running. Apply 1 bag of BurnOut 3 per 16,500 gallons every other week. BurnOut 73 does not need to be pre-dissolved if added to a depth greater than 4 feet and the water temperature is above 65 degrees. Swimming should not resume until the chlorine level is within the range of 1-4ppm.