Instructions: To estimate evaporation, select the date and time range that matches your physical water loss measurement. Ensure the water level is marked and compared over a full 24-hour period.
Measured Water Loss: This is your own manual observation of how much water was lost over the exact 24-hour period selected in Start Date/Time. Use a ruler or tape to track change in water level.
Sunlight Exposure: Choose Full if your pool receives more than 6 hours of direct sun, Moderate for 3–6 hours, or Shaded for less than 3 hours.
Wind Exposure: Select Exposed if your pool is fully open to wind, Moderate for some shelter, or Calm if surrounded by trees, fences, or buildings.
Inch Values: You may enter and view fractional inch values (e.g., 1/4, 1/2) for measured water loss.