Pool Care Glossary
Plain-English definitions of essential pool terms: free chlorine, CYA, total alkalinity, breakpoint chlorination, salt cells, turnover, the Langelier index, and calcium hardness.
What Is Free Chlorine?
The chlorine actually available to sanitize.
Read more →What Is CYA (Stabilizer)?
Cyanuric acid and how it protects chlorine.
Read more →What Is Total Alkalinity?
The buffer that keeps pH stable.
Read more →What Is Breakpoint Chlorination?
The shock threshold that clears chloramines.
Read more →What Is a Salt Cell?
How a salt system generates chlorine.
Read more →What Is Turnover?
Circulating the whole pool through the filter.
Read more →What Is the Langelier Index?
The water-balance score for scaling vs corrosion.
Read more →What Is Calcium Hardness?
Dissolved calcium and why it matters.
Read more →