The Pondmaster CPF Compact Pressurized Filters for small ponds. Use in small garden ponds, barrel or container ponds. Each includes a large filter media chamber which includes reusable mechanical and biological media. The compact design is easily concealed in your landscape or buried up to the lid. Available in three sizes, up to 250 gallons, 500 gallons and 1000 gallons. Inlet size 3/4" i.d. hose, outlet size 3/4" i.d. hose (not included) All units with UV have 11W UV clarifiers. If