Possible Cause
Combined chlorine level is too high
Solution
Shock treat with OXY-BRITE. Then test for free chlorine residual and adjust to maintain residual of 1-3 ppm.
Preventative Maintenance
Test chlorine level daily. Maintain pH of 7.2-7.8, total alkalinity of 80-120 ppm, and free chlorine level of 1-3 ppm. Use OXY-BRITE (1lb. per 10,000 gallons) weekly.
Possible Cause
pH too low or too high
Solution
Test pH and correct with pH UP or pH DOWN.
Preventative Maintenance
Maintain pH of 7.2-7.8 and total alkalinity of 80-120 ppm.