Test your pH every day before adding a high dose of bleach. Try and sustain the high cl reading without letting it yo-yo up and down. What is your cl reading in the evening before you add more? Sometimes upon opening, some pools have a high chlorine demand and it takes awhile and lot of bleach to clear the CC and have the cl reading hold. It gets frustrating and you think it will never be fixed, but then finally it does. Hang in there!