Pool Care Shock Advanced, Swimming Pool Chemical Prevents Bacteria & Algae, Cal Hypo Formula, 1 lb (Pack of 6)

: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity : Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity : This Cal Hypo based formula sanitizes without adding cyanuric acid () to prevent overstabilization or chlorine lock : This product is great for all pool types including vinyl-lined pools and saltwater systems ' : For best results, use with 6-Way Test Strips to test and balance your swimming pool water twice weekly Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity| : This Cal Hypo based formula sanitizes without adding cyanuric acid () to prevent overstabilization or chlorine lock| : This product is great for all pool types including vinyl-lined pools and saltwater systems