Use this Filter Falls with the Skimmer Filter or use to make a water fall as indicated in the drawing. Inside the unit is a "spray bar" that will oxygenate the water as it passes through 3 mechanical brushes and filter media that removes debris. Uses biological "biospheres" filter media that keeps your water clean and healthy. Has a built in safety overflow. Size: 33" long, 20" wide, 20" high. Can easily be hidden as shown in the drawing. Has a 1-1/4" to 1-1/2" inlet for tubing. Comes with an instructional installation DVD. Ponds up to 5000 gallons. Tricker's is a direct distributor of Laguna products, purchase with confidence. An additional .00 will be added to the Tricker's standard shipping.