What is one advantage of using cyanuric acid as an additive in water?

Cyanuric acid is primarily used in swimming pools and other water treatment systems to stabilize chlorine. Chlorine is effective in disinfecting water, but sunlight can cause chlorine to dissipate quickly. The addition of cyanuric acid helps to protect the chlorine from degradation by UV rays from the sun, effectively extending its residual lifespan in the water. This stabilization is particularly important in outdoor pools where exposure to sunlight can lead to rapid chlorine loss, ensuring that the disinfecting properties of chlorine are maintained over a longer period.

The other choices do not accurately reflect the role of cyanuric acid. While taste and clarity can be influenced by various chemicals in pool water, cyanuric acid does not directly enhance taste or increase clarity. Additionally, cyanuric acid does not reduce pH levels; in fact, it can cause a slight increase in pH if not managed correctly. Therefore, the correct choice highlights the essential function of cyanuric acid in maintaining effective chlorine levels in water treatment.