Step 2 of the Sustain 3-Step Pool Care System.

Sustain 3-inch blue chlorinating tablets keep your swimming pool looking great by providing routine sanitizing power all week long. A proprietary erosion modifier built into every tablet delivers chlorine more consistently than conventional white (Trichlor) tablets, giving you steadier protection between weekly treatments.

Unlike most pool tablets, Sustain Chlorinating Tablets do not contain cyanuric acid (CYA), which over time can build up and inhibit chlorine effectiveness. The included skimmer dispenser cup has an easy-to-use adjustable lid that lets you control exactly how much chlorine your pool receives.

Pack size: 16 lb bucket
One tablet treats: up to 10,000 gallons of water for up to 7 days
Use with: Sustain Summer Shield Chlorine Extender (Step 1) and Sustain Shield Energizer Tablets (Step 3)

Sustain® is a registered trademark of Westlake Corporation.