What is total alkalinity in pool water?

Total alkalinity is measured in parts per million (ppm) of carbonates and bicarbonate salts in pool water. It helps stabilise pH. 

Glossary terms: 

Total Alkalinity (TA) — The measure of carbonates and bicarbonate salts in water that helps stabilise pH. 

ppm — Parts per million. A standard unit used to measure small concentrations of chemicals in water (for example chlorine, alkalinity, hardness and stabiliser).