Bromine is much less dependent on what factor compared to chlorine for its reactivity?

Bromine is significantly less dependent on pH compared to chlorine for its reactivity due to its chemical properties. Unlike chlorine, which exhibits greater stability and reactivity at certain pH levels, bromine maintains a relatively consistent disinfecting ability across a wider pH range. This trait makes bromine a more reliable choice in varying water conditions, as its effectiveness does not diminish as drastically with changes in pH. Consequently, pool operators often prefer bromine in environments where pH fluctuates, ensuring better sanitation and lower maintenance challenges.

The other factors listed, such as temperature, chlorine concentration, and organic matter, influence the reaction rates of both bromine and chlorine. However, bromine's reactivity remains steadier at different pH levels, making it advantageous for pool maintenance where pH levels can be less predictable.