Details: Used as a sterilizer, the Aqua Ultraviolet Classic 160 Watt UV is the premium choice for 6000-8500 gallons of fresh water. Used as a clarifier, the Aqua Ultraviolet Classic 160 Watt can treat up to 16000 gallons of fresh water that has 50% to 75% plant coverage. Features: Easy twist cap for easy quartz sleeve maintenance just one cap to twist for access to the quartz sleeve. Quick release tees for easy installation and winterization. Lamp is positioned in the housing for maximum UV effectiveness. Slender housing design allows for higher UV dosage. The unit is designed for maximum flow rates. Easy to remove remote power supply. Designed for indoor or out door use.