Tetra GreenFree 3 UV Clarifier

Ultraviolet light destroys suspended algae, the dead algae clumps together in particles large enough to be removed by flitration. Easliy installed. Hose Fittings included. 36 watt, for ponds up to 8800 gallons, maximum flow 4400 gph, accepts 1" or 1 1/4" or 1 1/2" hose UV bulbs have an 8000 hour life, manufacturer recommends replacing after 11 months of continuous use. 3 year warranty.