What does Total Dissolved Solids (TDS) represent in pool water?

Total Dissolved Solids (TDS) refers to the measurement of all dissolved substances in the pool water, which includes minerals, salts, and chemicals. A higher TDS level indicates a higher concentration of these dissolved materials, which can influence the water quality and clarity, as well as the effectiveness of the sanitizing agents used in the pool.

Monitoring TDS is essential because elevated levels can lead to issues such as scaling, cloudy water, and even decreased effectiveness of chlorine or other disinfectants. Regularly testing for TDS helps ensure that the water remains balanced and safe for swimming.

The other options represent unrelated aspects of water chemistry. Free chlorine specifically measures the available chlorine for disinfection, while the presence of algae pertains directly to biological contamination rather than dissolved solids. The pH level quantifies the acidity or alkalinity of the water, which is a different parameter altogether. Understanding TDS is crucial for overall pool maintenance and water management.