pH control field outcome
pH moved from 8.0 to 7.7 while four supporting readings held steady
A 0.20-gallon acid treatment moved pH from 8.0 to 7.7 while free chlorine, total alkalinity, CYA, and calcium hardness were unchanged one week later.
San Diego County, California · March 5 to March 12, 2026 (7 days)
- pH
- 8.07.7
- Free chlorine
- 3 ppm3 ppm
- Total alkalinity
- 95 ppm95 ppm
- Calcium hardness
- 460 ppm460 ppm
The situation
- High pH with otherwise stable measured chemistry.
Starting readings
- pH: 8.0
- Free chlorine: 3 ppm
- Total alkalinity: 95 ppm
- CYA: 60 ppm
- Calcium hardness: 460 ppm
Treatment recorded
- 0.20 US gallons of 31.45% muriatic acid
- 0.5 US gallons of 12.5% liquid chlorine as the weekly sanitizer treatment
Follow-up readings
- pH: 7.7
- Free chlorine: 3 ppm
- Total alkalinity: 95 ppm
- CYA: 60 ppm
- Calcium hardness: 460 ppm