Swimming pool alkalinity

Water Quality Maintenance. In addition to controlling algae and microorganisms such as bacteria, proper swimming pool maintenance requires control of free and combined available chlorine, pH, alkalinity, hardness, and saturation index. Ranges for various swimming pool parameters (Table 2) are recommended by The National Spa and Pool Institute (14). 

When the water is too alkaline, swimmers experience similar physical discomfort—burning eyes and nose and itchy, dry skin. The effect on the pool, however, is different. When water is alkaline, calcium dissolved in the pool water can precipitate (fall) out of solution. A precipitate is a solid that forms from a solution due to a chemical reaction. This solid creates unsightly scales on the sides of the pool. Like water that is too acidic, alkaline water also affects the efficiency of the chlorine. More chlorine needs to be added to alkaline water to effectively disinfect the pool. Over time, a swimming pool that is not kept at a neutral pH can become very expensive to maintain. 

Testing Water Quality Students use pool and spa test kits to test water for pH, chlorine, alkalinity, and hardness. Swimming pool and spa maintenance... 

But why is a pH indicator found in a swimming pool test kit Why is it important to know how acidic or alkaline a swimming pool is Let s plunge into that topic. 

Some calcium and other minerals are found naturally in any water that has percolated through the ground. So if the swimming pool is allowed to become too alkaline, it will grow cloudy, at best, with suspended particles of insoluble salts or encrusted with growths of scale at worst. This appearance of a solid in a liquid solution is called precipitation, just as rain is called precipitation, because of the propensity of the solids to come out of the solution just as rain comes out of the sky. 

I Lithium is an alkaline metal element that occnrs naturally as the mineral petalite. It is widely used today in swimming pool filters and batteries for mobile phones and computers. 

These considerations are important because they show that the form in which chlorine is added can affect the water chemistry in different ways. The addition of significant amounts of Cl2(g) to a low alkalinity water could depress pH to an unacceptably low value. Bleach addition would not cause such a pH depression. The use of HTH as a disinfectant in swimming pools is not to be recommended because the increase in hardness and alkalinity that accompanies its addition can aggravate scale (CaCOa precipitation) problems. 

If you swim in the ocean, it is the salt if you swim in a pool, it could be the chlorine. Also, the cheaper high-alkaline shampoos cause hair drying. 

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