The Laguna Skimmer Filter can be used for ponds up to 5000 gallons or used with a Laguna Filter Falls for up to 10,000 gallons (see product next)! The pump is placed inside of this skimmer. Recommended pump can be from 900 gph to 3000 gph as a single unit. Larger pumps can be used when used in combination with the Filter Falls Unit. Inside of unit is a debris net, mechanical and biological chambers (removable for easy access and maintenance), and biosphere filer media. Reinforced lid that can withstand up to 200 lbs. Floating skimmer door automatically adjusts to pond water level (keeps large particles from entering or fish). Placement and attaches as shown in the photograph. Size: 33" long, 20" wide, 20" high. Comes with an instructional DVD. Note: An additional .00 will be added to the Tricker's standard shipping.