SWIMMING POOL WATER CHEMISTRY TROUBLE SHOOTING GUIDE

Problem   Symtom   Cause   Remedy
Green Water   Green Color   Algae
Corrosion of Copper
  Adjust pH, shock treat with shock treatment. Repeat if Necessary. Follow remedies for colored water and corrosion of metal parts.
             
Corrosion of Metal Parts   Metal fixtures in contact with pool water being eaten away; rust stains; copper stains; colored water   Low pH and or Low Alkalinity and or Low Calcium hardness.   Adjust pH to 7.2 - 7.6 by adding pH plus. Raise alkalinity to 60-100 ppm if using granular and 90-125 ppm if using chlorine tablets or sticks. Raise calcium hardness to a minimum of 200 ppm by adding calcium plus. FOLLOW LABEL INSTRUCTIONS
             
Chlorine Odor   Swimmers, eyes become irritated, water has an unpleasent odor, complaints of to much chlorine in water.   Chlormines formed by reaction with bathers waste.   Adjust pH to 7.2 - 7.4 shock treatment. Repeat if Necessary.
             
Eye and Skin Irritation   Red eyes, itching eyes   Chlormines (see chlorine odor) improper pH   Adjust pH, shock treat with shock treatment. Re-adjust pH with pH plus (soda ash) or pH minus (dry acid) or muriatic acid to 7.2 - 7.6 range.
             
Algae   Green or brown algae turn water green, pool surfaces feel slippery, can also cause cloudy water. Black algae forms patches on pool sides, giving them a spotty look.   Insufficient Chlorine. High stablizer level. Improper pH   Adjust pH, shock treat with shock treatment. Vinyl liner: Use soft nylon brush. Repeat if necessary. Add algaecide. Follow dosage recommended on label.
             
Scale Formation   Scale on pool wals and fixtures. Frequent in new inground pools.   High pH, excess alkalinity. Excess calcium hardness   Reduse pH to 7.2 - 7.6 with pH minus or muriatic acid. Use pH minus to reduce total alkalinity to 60-100 ppm if using chlorine granular. 90-125 ppm if using chlorine tablets or sticks depending on pH and calcium hardness. Lower calcium hardness if necessary by draining water and replacing it with water having a lower hardness.
             
Colored Water   Brown, Black, Blue-green water   Iron, Manganese, copper in excess   Shock treat with shock treatment. Floc pool or sand filter with alum (not recommended for DE or cartridge filters). Follow remedy for corrosion of metal parts. To prevent colored water use stain and scale controller. Follow Instructions.
             
Excessive Available Chlorine   Bleached hair and bathing suits. Possible eye irritation.   Excess Chlorine   Add sodium sulfite or sodium bisulfite or sodium thiosulfite.
             
Cloudy Water   Hazy, cloudy water, lack of sparkle.   Early algae growth. Pool filtration, High pH, high alkalinity   Adjust pH to 7.2 - 7.4 shock treatment. Check filter operation. Re-adjust pH with pH minus or muriatic acid to 7.2 - 7.6. Add clarifier to aid filter in removal of fine suspended particles.Follow Instructions.
             

Update:01/31/2006