If it's not caused by algae, blue-green water is often due to a high copper content in the water makeup or highly aggressive water corroding copper pipes and heater elements. Balance the water and use a sequestering or chelating agent.
The Pool Pump • The Filters • Sand Filtration • D.E. Filtration • Cartridge Filtration
Water Chemistry • Popular Disinfectants • Chorine • Calcium Hypochorite • Sodium Hypochlorite • Stabilized Chlorines •
Bromine • Other Disinfectants • Water Balance • pH • Total Alkalinity • Calcium Hardness • Total Dissolved Solids •
Balancing Pool Water • Water Testing • Pool Vacs & Sweepers
Pool Maintenance • Daily Chores • Weekly Chores • Solving Common Problems • Cloudy, Milky Water • Malodorous, Irritating Water
Green Water • Red or Brown Water • Blue - Green Water • Blue or Black Water • Pump Problems • Sand in Pool •
Excessive Water Loss • Excessive Foaming