Muriatic acid, also known as hydrochloric acid, is commonly used to adjust the pH level of pool water. The pH level of pool water refers to its acidity or basicity and is measured on a scale of 0-14, with 7 being neutral. Ideally, the pH level of pool water should be between 7.2-7.8.
When the pH level of pool water is too high (above 7.8), the water can become alkaline, which can cause a variety of issues. Alkaline water can lead to scaling on the walls and floor of the pool, cloudy water, and can also cause irritation to the eyes and skin of swimmers. Additionally, high pH levels can also prevent chlorine from effectively disinfecting the water, making it more difficult to maintain the proper level of chlorine in the pool.
Adding muriatic acid to pool water can help lower the pH level and bring it back into the recommended range. When added to water, muriatic acid will release hydrogen ions, which will decrease the pH level. It's important to note that muriatic acid should be added to water slowly and in small amounts, as adding too much at once can cause the pH level to drop too low, which can also cause issues.
In addition to adjusting pH, Muriatic acid is also used to lower the total alkalinity (TA) of the pool water. Total alkalinity is a measure of the water's ability to neutralize acids. If the total alkalinity of the water is too high it can make it difficult to adjust the pH level. Lowering the total alkalinity will make it easier to adjust pH levels and maintain them in the desired range.
It's important to regularly test the pH and total alkalinity levels of pool water using test strips or a pool test kit and adjust as necessary. It's also important to wear protective gear such as gloves and goggles when handling muriatic acid and to always add the acid to water, never water to acid.
In summary, the addition of Muriatic acid to pool water is important to maintain the proper pH level, which is critical for the pool water to be safe and comfortable for swimming and also to lower the total alkalinity level and make it easier to maintain the pH level. Regularly testing and adjusting the pH and total alkalinity levels of pool water, as well as following proper safety precautions when handling muriatic acid, is essential to maintaining a well-functioning pool.