Product review (4 stars): Solid replacement filters
Go Green or Go Home ;)....Ensure you read the instructions prior to replacing your old filter.  Its recommended to sock the filter in h20 to remove any air pockets for 15-mins prior to installation.  Visual esthetics may cause you to think the filter doesn't fit as their is a small gap between the installation cylinder for the filter and the outer rim of filter holder.  No worries, the filter want leak.