“Dissolved solids” refer to any minerals, salts, metals, cations or anions dissolved in water.
Total Dissolved Solids (TDS) comprise inorganic salts (principally calcium, magnesium, potassium, sodium, bicarbonates, chlorides, and sulfates) and some small amounts of organic matter that are dissolved in water.
TDS is important for swimming pools as to how clean and safe the water will be.
For example, a typical salt or mineral pool will run anywhere between 3000ppm up to or above 6000ppm.
A Naked Pool runs as low as 800ppm, providing Crystal Clear, Fresh Water.