Complete filtration for ponds up to 5000 gallons. If you need to add more filtration capacity for ponds over 5000 gallons no problem- Savio's modular design makes it easy to connect multiple units together. Filters harness the natural dynamics of moving water. Their cylindrical design is carefully engineered, therefore putting pond water into a self cleaning, highly dynamic "spin cycle". This process removes the heavies debris before it gets to the filter media, also insuring that the water is evenly distributed throughout the entire filter chamber. Operates nearly 4 times more effectively than clunky box filters.