Hello! We have an 11,000 gallon gunite pool in Central Florida and have a local company who services the pool every week. Each week they send us a summary of the tasks they’ve completed, along with the chemistry. This is what they sent us this week:
Completed Checklist Items:
Brushing
Skim
Clean Tile
Clean Baskets
Measures:
Chlorine 0.5
pH 8
Total Alkalinity 100
Cyanuric Acid 70
Treatments:
Chlorine Liquid 3 Gallon
Muriatic Acid 1 Quart
Completion Notes:
24 hours later, and this is the chemistry reading we got from the local pool supply store:
Something isn’t adding up to me. Would adding 3 gallons of liquid chlorine cause the chlorine to go from 0.5 to 15?! This has been a common occurrence and they said they don’t believe the pool store reading.
Completed Checklist Items:
Brushing
Skim
Clean Tile
Clean Baskets
Measures:
Chlorine 0.5
pH 8
Total Alkalinity 100
Cyanuric Acid 70
Treatments:
Chlorine Liquid 3 Gallon
Muriatic Acid 1 Quart
Completion Notes:
24 hours later, and this is the chemistry reading we got from the local pool supply store:
| Free Chlorine | 1 - 4 ppm | 15 | |
| Total Chlorine | Within 0.2 of FAC | 15 | |
| 7.2 - 7.8 | ÷ 7.9 | ||
| Total Alkalinity | 80 - 120 ppm | 91* | |
| Calcium Hardness | 200 - 400 ppm | 176 | |
| Cyanuric Acid | 30 - 100 ppm | 75 | |
| iron | 0 - 0.2 ppm | 0.1 | |
| Copper | 0 - 0.2 ppm | 0.1 | |
| Phosphates | 0 - 100 ppb | 483 |
Something isn’t adding up to me. Would adding 3 gallons of liquid chlorine cause the chlorine to go from 0.5 to 15?! This has been a common occurrence and they said they don’t believe the pool store reading.
