Product review (1 stars): Potentially Worse than No Filter!
I don't think these filters did anything but potentially contaminate the water. I ran it for several minutes on installation. I kept having grey pieces of something floating in the water. I can only assume it was from the filter itself. Occasionally, they would not be presents but then return a few glasses later. I tried another filter and the same issue. Also, the water flow was way faster than with previous name brand filters. This leads me to believe it was really filtering anything.