Features a unique, manually operated agitator for dislodging over 90% of the pond residue that accumulates in the filter chamber. Easy to use valve can be switched to backwash, filter , rinse or waste. Includes a 10w UV that can destroy water borne algae and harmful bacteria. Unique Bio-Matrix media affords maximum surface area for beneficial bacteria growth. 20″H 17″ Dia. 17′ cord. Filters up to 1000 gallons. Max pump flow 2000 gph. 1.5″ FNPT fittings. 1 year warranty. (except UV bulb)