Which of the following is NOT a recommended practice for pool water chemistry?

The choice indicating that allowing debris to accumulate is not a recommended practice for pool water chemistry is correct due to the negative impact that debris can have on water quality and overall pool maintenance. Accumulated debris can lead to the growth of harmful bacteria and algae, interfere with sanitizer efficacy, and create an unsightly environment for pool users. Regular removal of debris is essential to uphold water clarity, ensure the effectiveness of chemical treatments, and maintain a safe swimming environment.

The other practices listed—regularly testing water parameters, maintaining proper sanitizer levels, and checking equipment functionality—are all critical components of effective pool management and water chemistry. Testing water regularly allows for the adjustment of chemical levels as necessary, while maintaining proper sanitizer levels helps prevent issues such as algae growth and ensures that the water is safe for swimming. Regular checks of equipment functionality ensure that all systems are operational and effective in maintaining water quality, further contributing to safe and enjoyable swimming conditions.