CYA Switch
Hot Tub CYA Switch Point
Dichlor provides chlorine and adds CYA. A planned switch point helps keep dosing predictable over a refill cycle by limiting continuous stabilizer accumulation.
Simple Tracking Model
- Set one CYA threshold in your profile.
- Log each dichlor dose.
- Add each dose's estimated CYA contribution.
- Mark whether the threshold is building, due, or switched.
Example Status Table
| Accumulated CYA | Threshold | Status |
|---|---|---|
| 18 ppm | 30 ppm | building |
| 30 ppm | 30 ppm | switch due |
| 30+ ppm | 30 ppm | switched to liquid mode |
Authoritative Context
Cyanuric acid is a chlorine stabilizer, and stabilized chlorines increase it over time. Read the CDC context on cyanuric acid and chlorine stabilizers.
For operational targets and treatment specifics, follow local guidance, chemical labels, and manufacturer documentation.
Track It in Spa Switch
Spa Switch keeps the calculator free. The paid history view tracks accumulated CYA across logged dichlor doses since refill and shows when your threshold is reached.
Track your switch pointRelated: read the liquid chlorine dose workflow.