Not checking your pool's science regularly enough. Check the pool's science once every week in the late spring and once every week in the winter. By doing this you can make minor changes in accordance with your water science rather than huge modification that make a wild here and there chart of movement. Permitting pH to get above 8.0. At 8.5 chlorine is just 10% dynamic. At 7.0 it is around 73% dynamic. By simply keeping up pH around 7.5 the chlorine is 50-60% dynamic. Holding the pH under tight restraints will permit you to use to the maximum capacity the chlorine that is as of now in the pool. Not keeping alkalinity between 80-140 PPM. Low or high alkalinity can influence water equalization and at last a sanitizer's capacity to perform. Not checking TDS (Total Dissolved Solids) or calcium hardness all the time. Check TDS like clockwork and calcium hardness consistently. These additionally influence water equalization which is not quite the same as ...