5 lb Nuclo 7 Day Tablets
Trichlor—or “Trichloro-S-Triazinetrione” is a type of chlorine that's commonly used in swimming pools. ... The tablets are slowly dissolved and drip-fed using an automatic chlorinator, a floating dispenser or sometimes the pool skimmer.
Each tablet covers 7,500 gallons of pool water
Used to maintain a steady flow of chlorine to your pool