The water isn't getting filtered, even at its strongest flow. It's easy to clean and I prefer glass over plastic, but due to the large size of the bowl and the small space that the water flows around and through the filter, nothing is getting filtered out. The water is never clear and clean. My cat doesn't like drinking out of it, and I think this is the reason. I see bits of dust, bugs and other things within a few hours of cleaning and changing the water. I wish I had stuck with my previous fountain.