My PUR water filtration suddenly just stopped working after almost 4 years of use. I'm not sure if it's just old age or what. This is level 2. There is a level 3 but a bit more expensive. Curious what you people have tried and up to what levels do these water filtration go up to? The book Smart Drugs & Nutrients made a suggestion (on page 174) about "Multi Pure Model 500 Activated Carbon Block water filter that indicates that the filter removes more than 99.99% of aluminum sulfate from the water."
The book is old so I'm not sure if the Multi Pure brand is still in business. Any suggestions?