Ensure your pool’s pH level is between 6.8 - 7.2. Ensure alkalinity level is between 80-120ppm. Backwash the pool. With the motor running and the valve set in filter position, empty both bottles of Activator D into the weir. Do not pour directly into the pool. Backwash weekly & keep pool brushed and baskets clear. Add one set of Activator D per a 50 000l monthly.