What is the recommended cyanuric acid level in ppm?

The recommended cyanuric acid level in ppm (parts per million) for outdoor swimming pools is crucial for maintaining effective chlorine stability and preventing degradation from sunlight. A level of 30-40 ppm is generally considered too low to provide sufficient protection for chlorine in pool water, especially in sunny environments where UV rays can break down chlorine rapidly.

On the other hand, higher levels, such as 60-70 ppm, can lead to potential issues if levels exceed the recommended amounts. High concentrations of cyanuric acid can interfere with the disinfecting capabilities of chlorine and make it less effective in sanitizing the water.

Therefore, the optimal range of 50-60 ppm ensures that cyanuric acid serves its purpose effectively, balancing the protection of chlorine while avoiding complications associated with excessive levels, thus making it the correct choice.