What is the recommended alkalinity range of a pool in parts per million (ppm) for calcium carbonate?

The recommended alkalinity range for a swimming pool, specifically for calcium carbonate, is recognized as 80 to 120 parts per million (ppm). Maintaining alkalinity within this range is essential for several reasons.

Firstly, proper alkalinity helps to stabilize the pH levels in the pool water, which is crucial for the effectiveness of chlorine and other disinfectants. A stable pH helps to prevent fluctuations that can cause discomfort for swimmers and reduce the effectiveness of sanitation efforts.

Secondly, when the alkalinity is within this recommended range, it helps to prevent corrosion of metal components and equipment in the pool, as well as scaling on surfaces and fixtures. High and low alkalinity levels can lead to a range of issues, including cloudy water, skin irritation, and damage to the pool's infrastructure.

Thus, keeping the alkalinity between 80 and 120 ppm is not only about maintaining water clarity and safety but also about prolonging the life of the pool's structure and equipment. This understanding highlights why this specific range is emphasized for pool maintenance.