Round is better… Savio Livingponds Filters harness the natural dynamics of moving water. Their carefully engineered cylindrical design puts pond water into a self-cleaning, highly dynamic “spin cycle”. This process removes the heaviest debris before it get to the filter media and ensures that the water is evenly distributed throughout the entire filter chamber. The net result is a filter that operates nearly 3x more effectively than those inefficient square filters! Savio Livingponds Filters run at nearly 97% efficiency at startup and maintain 85-90% efficiency at 8-10 weeks using Savio Springflo media.