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According to the Certified Pool - Spa Operator Handbook, the ideal level for total water alkalinity is ppm

  1. 60-100

  2. 70-110

  3. 80-120

  4. 90-130

The correct answer is: 60-100

The ideal level for total water alkalinity, also known as TAlk, is generally advised to be between 60-100 ppm. Alkalinity measures the water's buffering capacity and helps to keep the pH levels stable. Levels below 60 ppm can cause the water to become corrosive, while levels above 100 ppm can cause scale formation and cloudiness. Therefore, options B, C, and D with higher ranges are incorrect as they can lead to issues with the pool or spa water. Option A falls within the advised range and is therefore the ideal level for total water alkalinity.