HTH Swimming Pool Care Shock and Green to Blue Systems (1lb x 6 Packs) and (1 Kit)

• Use the shock product to increase chlorine levels, prevent bacteria, algae, stain, and scale, reduce skin and eye irritation, improve filtration, and soften your swimming pool water quickly and easily. The green to blue system helps fight a severe algae bloom and transforms your swimming pool water from green to blue in 24 hours with an easy-to-use 2-step system. The shock product provides visible blue action to let you know it is working without adding cyanuric acid (CYA). Both products are compatible with all swimming pool types including vinyl-lined pools and saltwater systems. For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly.