What does CH represent in pool water testing?

The abbreviation CH in pool water testing stands for Calcium Hardness. It is an important parameter that measures the concentration of calcium ions in the water. Maintaining proper calcium hardness levels is crucial for pool maintenance, as it helps prevent corrosion of pool equipment and surfaces, as well as scaling on tiles and plumbing.

When calcium levels are too low, it can lead to 'corrosive' water, which can damage pool components and hurt the efficiency of sanitizing chemicals. Conversely, excessively high calcium levels can cause scaling, which can create problems in filtration systems and affect the appearance of the water.

Balancing calcium hardness is therefore vital for ensuring the safety, comfort, and longevity of the swimming pool. Proper testing and adjustment of this parameter help pool operators maintain optimal water chemistry for clear and safe swimming conditions.