GLB®
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Cloudy, Dull Water

Possible Cause Solution Preventative Maintenance

Backwashing sand filters too often

Backwash less frequently, only as recommended by the filter manufacturer’s directions.

Use Filter Rinse once a month while backwashing the filter.
Dirty filter

Clean filter with Filter Fresh® filter cleaner. Renew sand filter efficiency with Filter Rinse.

Backwash as necessary and clean filter thoroughly as needed.

Dissolved metals in the water

Use Sequa-Sol® sequestering agent to control metals in the water.

Use Sequa-Sol® sequestering agent (4 fl. oz. per 10,000 gals.) weekly.

Filter not removing small particles

Use Clear Blue® clarifier to coagulate small particles. Check filter operation.

Use Clear Blue® clarifier (1 fl. oz. per 5,000 gals.) weekly. Vacuum pool as needed to remove any settled material.

Free chlorine residual too low

Test for chlorine residual and adjust as needed with a GLB® chlorinating sanitizer. Treat with GLB® Super Charge or Oxy-Brite® non-chlorine shock oxidizer.

Test  daily and maintain free chlorine level of 1-4 ppm.

pH too high

Test pH and total alkalinity. Add pH Down as directed and adjust as required.

Test frequently and maintain a pH of 7.2–7.8 and a total alkalinity level of 60-120 ppm.