A 3" tablet. DUO Z CHLOR is a sanitizer formulated with two types of chlorine – one fast-dissolving and the other slow-dissolving – that work together to maintain constant water disinfection. This dual action ensures greater stability of water parameters and facilitates weekly pool water maintenance.
Maintains a constant chlorine level by dissolving in two steps
Destroys algae using state-of-the-art zinc oxide technology and controls bacteria in swimming pool water
For optimum efficiency, use in a floating dispenser or place tablet(s) in the skimmer basket.