Weekly test and correct the pH and chlorine level of the pool water. The ideal pH range is between 7.2-7.6. If the pH is below 7.2, PoolBrite Soda Ash is required to increase the pH to the correct level. If the pH is above 7.6, acid is used to reduce the pH of the water. The ideal chlorine range is between 1-3ppm (parts per million). If the chlorine level is below 1ppm shock treat the pool water with Month Mate Granular Xtra Blue, 100g per 10 000 litres or Month Mate Shock Xtra Blue, one 450g bag per 50 000 litres.