Which of the following contributes to improved pool water quality?

The regular addition of shock treatments and sanitizer plays a crucial role in maintaining and improving pool water quality. Shock treatments are designed to eliminate contaminants such as chloramines, bacteria, and organic material that can accumulate in the water. By breaking down these substances, shock treatments help restore the effectiveness of the sanitizer in the pool. Furthermore, consistent use of sanitizers, such as chlorine or bromine, ensures that pathogens are kept at bay, providing safe and clean water for swimmers.

Additionally, maintaining proper chemical balance through regular shock treatments helps prevent issues like algae growth and cloudy water, which can arise when water quality is neglected. This proactive approach ensures that the pool environment remains healthy and inviting, benefiting both pool users and the overall maintenance of the pool facility.

The other options do not promote improved water quality. Keeping the pool covered at all times can lead to increased humidity and potential algae growth without adequate sunlight and circulation. Avoiding regular water testing prevents you from monitoring chemical levels, which is essential for effective pool maintenance. Decreasing the frequency of water changes can cause the buildup of total dissolved solids and other contaminants, ultimately degrading water quality.