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Calcium Why do we need it in swimming pools

Calcium is an essential mineral that is required for several biological processes in the human body. It is also an important component in maintaining the chemical balance of swimming pool water. Calcium is added to pool water in the form of calcium hypochlorite or calcium chloride. These compounds raise the calcium level in the pool, which helps to prevent corrosion, staining, and algae growth.

One of the primary reasons why we need calcium in swimming pools is to prevent corrosion. The pool equipment, such as pumps, filters, and heaters, are made of metal and are prone to rust and corrosion when exposed to water for extended periods. Calcium helps to create a protective layer on the metal surface, which prevents rust and corrosion. This layer also acts as a barrier between the metal and other chemicals in the water, such as chlorine and bromine, which can be highly reactive and damaging to metal surfaces.

Calcium also helps to prevent staining in swimming pools. Stains can occur due to the presence of minerals, such as iron, copper, and manganese, in the water. These minerals can leave unsightly marks on the pool surface, which can be difficult to remove. Calcium helps to bind with these minerals, preventing them from causing stains on the pool surface.

Another important function of calcium in swimming pools is to prevent algae growth. Algae is a common problem in swimming pools, and it can cause the water to turn green and cloudy. Calcium helps to maintain the pH balance of the water, which makes it difficult for algae to thrive. It also helps to improve the effectiveness of chlorine and other sanitizers, which are essential for killing bacteria and other microorganisms in the water.

In conclusion, calcium is a vital component in maintaining the chemical balance of swimming pool water. It helps to prevent corrosion, staining, and algae growth, and ensures that the water is safe and healthy for swimming. Pool owners should regularly test the calcium levels in their pools and add calcium as needed to ensure that the water remains balanced and free from problems.

The recommended calcium levels for pools, 150 to 300ppm for fibreglass/vinyl and 200 to 400ppm for concrete pools.