Which safety measure is essential when handling pool chemicals?

Wearing protective gear is essential when handling pool chemicals because these substances can be hazardous. Pool chemicals often contain strong acids, bases, or chlorine compounds that can cause skin irritation, respiratory issues, or eye injury upon contact. By using appropriate protective gear such as gloves, goggles, and masks, individuals can significantly reduce the risk of exposure to harmful substances. This is a standard practice to ensure safety and health while performing maintenance tasks that involve potentially dangerous chemicals.

Proper handling protocol typically emphasizes the importance of safety first, making protective gear an indispensable part of working safely with pool chemicals. The other options mentioned, such as mixing chemicals freely or ignoring storage guidelines, can lead to dangerous reactions and incidents, highlighting the need for diligence and safety measures in these operations.