It is used to provide the required 30-180 ppm alkalinity value in pool water. It has high solubility and is harmless to human health. It does not cause deviations in the pH value of the pool water. It is a product used to regulate swimming pool water alkalinity. Total alkalinity in pool water is a measure of CO32-, HCO3-, OH- and other alkaline substances dissolved in the water. pH depends on alkalinity. Therefore, alkalinity can also be defined as the resistance to changes in the pH value of the water. It is also known as the pH buffering capacity of water. Swimming pool water alkalinity value should be kept between 30-180 ppm. Alkaline compounds are introduced into the water to raise the low alkalinity. These given compounds increase the pH value while increasing the alkalinity. GK A (+) alkalinity regulator increases the alkalinity without increasing the pH value too much.