What consequence may result from low calcium hardness in pool water?

Low calcium hardness in pool water can lead to corrosion of the pool fixtures. Calcium plays a vital role in maintaining water balance; when calcium levels drop, it can result in aggressive water that seeks to dissolve minerals from the pool's surfaces and equipment. This process can significantly damage metal components, such as ladders, railings, and heaters, leading to increased maintenance costs and potential safety hazards.

In addition, low calcium hardness does not contribute to balancing the pool water. Instead, it can create an unstable environment that can lead to further issues like pitting and deterioration of the pool’s surfaces. Therefore, maintaining appropriate calcium hardness levels is essential to protect the overall integrity of the pool and its fixtures.