Before adding this product to your pool
1. Clean and backwash the filter.
2. Adjust free available chlorine level to 1-3 parts per million (ppm) with an hth® chlorinating product. Follow label directions on that product.
3. Measure the stabilizer (cyanuric acid) concentration with an hth® test kit or test strips.
4. Calculate the correct amount of this product to maintain the Stabilizer in the ideal range of 20 -50 ppm.
Chlorine is not as effective if the stabilizer range is above 100 parts per million (ppm).