Product review (1 stars): It looks like I have received fake filter
I bought two filters. They came in white boxes. I put it in refrigerator and water became dark blue. I was thinking it is the problem with my water pipe. I cleaned the pipes. Made water to be crystal clear. Put another filter and got water more dirty than last one. It was big surprise to me. I  started search for the expiration date and have not found one. It looks a like I have received fake filter.