Routinely use to maintain levels of between 2-3ppm residual chlorine in small or domestic pools and 3-5ppm in public or heavily used pools. For each ppm of chlorine increase required use 40g per 25,000 Litres of water.
Spas and Hot Tubs:
To increase the free chlorine level by 2.5ppm, add 5 grams (a teaspoon). On average you should need approx. 1 teaspoon per person using the spa. Maintain a chlorine level of between 2-4ppm in your spa or hot tub. Re-adjust the pH balance to between 7.2-7.6 for optimum bathing comfort.
Please refer to packaging or MSDS
MSDS can be requested from
|Component||Sodium dichloroisocyanurate dihydrate|