Haviland Durachlor 56 Granular

When starting up a new pool, super chlorinate to satisfy chlorine demand and to establish a chlorine residual of 1.0-2.0 ppm available chlorine. To accomplish this, add 2 ounces of this product per 1,000 gallons of pool water. This product should be added daily or as needed at the rate of 1/2-1/4 ounce of perf 1,000 gallons of pool water to maintain a chlorine residual at all times of 1.0-2.0 ppm as determined by a suitable test kit. The pH should be maintained between 7.2 and 7.6. A shock treatment should be made every week during hot weather or after heavy rains. Less frequent shock treatments may be made during cool weather. For the shock treatment, add 2 ounces of this product per 1,000 gallons of pool water. Swimmer should not be permitted in the pool after the shock treatment until the residual has reached 1.0-2.0 ppm range. Reentry into treated swimming pools I prohibited above levels of 3.0 ppm chlorine.

Sodium dichloro-s-triazinetrione, dihydrate: 99%, Other Ingredients: 1%