brand new in box Quantity: This pack contains 50 pounds of chlorine tablets. Composition: The tablets are made of 99。05% Trichloroisocyanuric acid. Purpose: Sanitization: These tablets serve as a bactericide, algaecide, and disinfectant, ensuring your water remains clean and crystal clear. Corrosion Prevention: They help prevent equipment corrosion, surface stains, and scale. Usage: Dosage: Use 1 tablet per 5,000 gallons of water. Application: Add the chlorine tablets to your chlorine feeder, skimmer, or floater. Alternatively, incorporate them into an existing inline/offline chlorinator, allowing the pump flow to dissolve and distribute them. Longevity: These slow-dissolving tablets are long-lasting, providing consistent chlorination. A single dose can last up to 1 week. UV Protection: The tablets are UV protected.