Love this filter! Really well made, works great, attractive (compared to others;)...
I could tell when it was getting clogged around 5 1/2 months. Began to smell the kind of moldy smell that was always in our shower water before, and less water is getting through. Our water's really hard here and nasty old pipes, so no surprise. It just reminds me what a great job the filter has been doing.
Next time, I'll remember to reverse it at 3 months and then it will last all the way to 6 month mark...