Coordinated treatment field outcome
Free chlorine rose to 3 ppm as pH moved to 7.8
One recorded weekly treatment moved free chlorine from 1 to 3 ppm and pH from 8.0 to 7.8 while total alkalinity and CYA held steady.
San Diego County, California · July 31 to August 7, 2026 (7 days)
- Free chlorine
- 1 ppm3 ppm
- pH
- 8.07.8
- Total alkalinity
- 100 ppm100 ppm
- CYA
- 50 ppm50 ppm
The situation
- Low free chlorine and high pH required a coordinated sanitizer and acid treatment.
Starting readings
- Free chlorine: 1 ppm
- pH: 8.0
- Total alkalinity: 100 ppm
- CYA: 50 ppm
Treatment recorded
- 1 US gallon of 12.5% liquid chlorine
- 0.25 US gallons of 31.45% muriatic acid
- 4 trichlor tablets
Follow-up readings
- Free chlorine: 3 ppm
- pH: 7.8
- Total alkalinity: 100 ppm
- CYA: 50 ppm