The Pentair Aquatics Lifegard QL-Series 40 Watt UV Sterilizer is for aquariums up to 300 gallons40 Watt UV lampIn lineConnections: 1-1/4" slip inlet, 1" slip outletRequires a pump with a flow rate less than 240 gphDimensions: 34.5" X 7.5" X 7"User Manual (pdf file in new window)Accessories:Pentair Aquatics Lifegard Horizontal Mounting Bracket KitPentair Aquatics Lifegard Raintight Kit, Ballast Enclosure and CouplingPentair Aquatics Lifegard ultraviolet sterilizers produce UV light at 2537 angstroms, exerting a lethal effect on the unwanted, disease causing micro-organisms. Pentair Aquatics UV sterilizers, when used properly, are extremely beneficial in destroying disease causing pathogens, harmful bacteria, mold spores, yeast, virus, protozoa, fungi as well as algae.Pentair Aquatics UV Sterilizers use pure hard quartz material in their bulbs, which dramatically increases the UV output as compared to other conventional bulbs of equal wattage. Pure quartz material resists solarization and improves the longevity of the UV bulb. The unique test tube like pure quartz sleeve isolates the bulb from water contact, providing an optimal bulb operating temperature of 100º F (38º C). This optimal bulb temperature results in a 35% higher UV output over conventional units without sleeves.