Dissolved solids in pool water represent a measurement of everything that has ever dissolved in your swimming pool water.
Specifically, this refers to the total amount of inorganic and organic materials that have dissolved within the water. Think of it as all the microscopic particles and substances that are no longer in solid form but are suspended invisibly throughout the pool.
This measurement, often referred to as Total Dissolved Solids (TDS), encompasses a wide range of substances. As the reference states, this includes:
- Minerals that separate from your pool chemicals, such as calcium and sodium.
- Dissolved dust and pollen.
- Swimmer waste (like sweat, oils, cosmetics).
- Algae remains.
- ...literally everything that dissolves!
Over time, as the pool is used, chemicals are added, and environmental debris enters the water, the level of dissolved solids steadily increases. While some level of dissolved solids is normal and even necessary (like those from balancing chemicals), excessively high levels can impact water quality, chemical effectiveness, and even lead to cloudy water or scaling.
Understanding TDS is part of maintaining healthy and balanced swimming pool chemistry. Regular testing helps pool owners monitor these levels and determine when actions like partial draining and refilling might be necessary to lower the concentration of dissolved solids.
Examples of Dissolved Solids
Here's a quick look at common sources of dissolved solids in pool water:
| Source | Examples of Dissolved Solids |
|---|---|
| Pool Chemicals | Calcium chloride, sodium salts, sulfates |
| Environmental | Dust, pollen, rainwater contaminants |
| Swimmer Activity | Sweat, body oils, lotions, hair products |
| Biological Matter | Algae byproducts, bacteria waste |
