- High ph – Use pH reducer to lower pH to 7.2 – 7.6 ppm
- Dirty Filter – Filter may need backwashed or for cartridge systems the filter may need cleaned or replaced.
- Low Free Chlorine – Shock pool, circulate overnight. Test and adjust free chlorine residual to 1-3 ppm
- High Total Alkalinty – Use pH reducer to lower Alkalinty to 80-150 ppm
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