Total alkalinity field outcome
Total alkalinity moved from 60 to 80 ppm after a single-product correction
A 4.2-pound sodium-bicarbonate treatment raised total alkalinity from 60 to 80 ppm while pH moved from 7.4 to 7.6.
San Diego County, California · November 5 to November 12, 2025 (7 days)
- Total alkalinity
- 60 ppm80 ppm
- pH
- 7.47.6
- Free chlorine
- 5 ppm2.5 ppm
- CYA
- 120 ppm120 ppm
The situation
- Low total alkalinity required a direct, measurable correction.
Starting readings
- Total alkalinity: 60 ppm
- pH: 7.4
- Free chlorine: 5 ppm
- CYA: 120 ppm
- Calcium hardness: 530 ppm
Treatment recorded
- 4.2 pounds sodium bicarbonate
Follow-up readings
- Total alkalinity: 80 ppm
- pH: 7.6
- Free chlorine: 2.5 ppm
- CYA: 120 ppm
- Calcium hardness: 530 ppm