A spa is its own venue
A spa chemical log should stand on its own because a spa has a smaller water volume, higher heat, and a different use pattern than a pool. That means the entries you track for free chlorine, pH, and other readings may need a separate row set. If you are setting up a simple log, start at the Poolsheet home page and then build the spa record around the venue itself.
Model code windows
The model code uses spa specific windows, and those windows are not the same as the pool row. The note below gives the figures for free chlorine and the other limits that matter here. If you want a broader overview of log layout, the guides hub and the features page can help you organize the record.
Cyanuric acid
In a spa, cyanuric acid is handled differently than in a pool, so do not assume the pool stabilizer entry can be reused as is. Some spa logs leave this out unless the local code asks for it. If you are building a template, the waitlist page is where you can follow Poolsheet as the app expands.
Temperature
Temperature matters in a spa chemical log because heat changes how the water behaves and how you read the rest of the test results. The model code note below includes the temperature window, and your local health department code still controls. For a starting point on paper style tracking, you can also look at the pool log sheet.
Spa windows in the model code
- pH of the water: 7.0 to 7.8 (section 5.7.3.4.1).
- Spas: minimum DPD free chlorine 3.0 ppm (section 5.7.3.1.1.2.3).
- Minimum bromine: 3.0 ppm for aquatic venues and 4.0 ppm for spas (section 5.7.3.1.2.2).
- Maximum bromine while open to bathers: 8.0 ppm (section 5.7.3.1.2.3).
- Cyanuric acid or stabilized chlorine is not used in spas or therapy pools for new construction, a substantial alteration, or a disinfection equipment replacement after the code date (section 5.7.3.1.3.1).
- Maximum water temperature for an aquatic venue: 104 F (40 C) (section 5.7.4.7.2).
- Maximum free chlorine: do not exceed the product label (section 5.7.3.1.1.5). This page does not print a numeric chlorine ceiling.
Sources: 2024 CDC Model Aquatic Health Code, 5th edition (PDF) and CDC notes on operating public pools. Poolsheet is not part of the CDC.
Follow your local health department code. Poolsheet is not a health authority, not a pool operator license, and nothing here means the water is safe. The CDC Model Aquatic Health Code is voluntary guidance, not your local rule.