The skimmerfilter's super strong injection molded housing and cylindrical design resists warping and compaction in the ground, winning the approval of landscape and irrigation professionals everywhere. The SS0000 is large enough to accommodate a large submersible pump or two medium size pumps. The Savio Skimmerfilter® works as a Complete Filtration Solution for ponds up to 1,000 gallons (or use with a Savio Livingponds Filter for larger water features and still enjoy the same clean, clear water). Savio Skimmerfilters® are the only skimmers on the market with a patented integrated UV system (sold separately) - a safe, chemical free way to eliminate green water. Filter media provides a surface for beneficial bacteria to colonize the skimmerfilter, converting biological waste from fish, ammonia and other toxins to inert forms for healthier ponds. The skimmerfilter protects and extends the life of your pump, providing a place to conceal ugly equipment and plumbing. When used with a biological filtration system, the skimmer prefilters debris allowing your filter to work more efficiently.