Water chemistry for your pool varies depending on whether or not the plaster is within the first 28 days of its life. After the 28 Day Start-Up Procedure has been performed, daily water chemistry should be maintained within the ‘ideal range.’
This range is as follows:
- Free Chlorine = 1 to 3 ppm
- Total Chlorine = 1 to 3 ppm
- Sequestering Agent as per Manufacturer’s directions
- pH = 7.2 to 7.6
- Carbonate Alkalinity = 80 to 120 ppm
- Calcium Hardness = 200 to 400 ppm
- Cyanuric Acid = 30 to 50 ppm
- TDS = 300 to 1800 ppm (non-salt pools)
- Salt Level = according to the manufacturer recommendations (salt chlorination ONLY)
You can use the LSI Calculator (Langelier Saturation Index) to determine if your water chemistry is balanced within the spectrum. The measurement from Scaling to Corrosive should show your pool’s water to be 0.0 to +0.3. Anything out of this range requires the proper chemical adjustments to bring your water within the acceptable range.
These measurements are a general consensus from the trade industry. It is recommended to verify the correct chemical balance for your pools’ water with the Pool Plasterer and Product Manufacturer as to the specific ranges they require.