Cyprio's pressurized Bioforce Filter can be used either above ground or in-ground. Being pressurized by a pump (not included) water can be pumped up from the Bioforce to the top of a waterfall. Available in 5 sizes . Bioforce represents a major advance in filtration effectivenessRecommended for Ponds up to 1000 Gallons Bioforce holds more beneficial bacteria than other filters of the same size. For maximum circulation through the filter, it is suggested to keep the hose short and the pumping height to a minimum, especially on the discharge side of the filter. Includes a Pop-Up indicator that shows when the filter needs cleaning. Bioforce 1000 measures 10" x 20" inlet / outlet 3/4" to 1" Max1000 gal pond Max flow rate 600 gph Recommended Pump Titan 800 Pump CY1452