PH-plus increases the pH level of the swimming pool water. The pH level of the swimming pool water is important for optimal functioning of chlorine products and should be maintained between 7.2 and 7.6. Consult your supplier if the pH level frequently needs to be corrected. If your swimming pool water has a pH level that is too low, you risk health complaints and skin conditions. With Interline's pH-Plus, you can correct the pH levels of the water upwards. - For increasing the pH level of swimming pool water - For optimal chlorine function - Granules - Suitable for hard and soft water