Product details:

HTH 3 Chlorinating Tablets are a simple, convenient way to keep your pool water clean and clear. Add 1 tablet per 10,000 gallons of pool water; just place tablets into the skimmer basket, floater or feeder to sanitize and protect your pool water from algae and bacteria. They are designed to dissolve slowly to give your pool a steady source of available chlorine for up to one week. HTH 3 Chlorinating Tablets are great for all pool types including salt water systems and vinyl pools.