You don’t need to get a professional to know when the filters in your water ionizer need to be replaced. Modern water ionizers have a counter or LED indicator installed on the panel frontage, which gives details information regarding the remaining life of the filter. Most of the standard filters have a lifespan of about nine months while the ultra-modern filters have a lifespan of about eight months. The lifespan of a water filter is mostly determined by the content of chlorine in the tap water. Water with a chlorine content of more than 1.0ppm is likely to last less than those with the content of less than 1.0ppm