The Aquascape UltraKlear® UV Clarifier/Sterilizer uses a technologically-advanced T5 high output UVC bulb, making it more efficient than traditional UV clarifiers. The UltraKlear® UV features a swirl sleeve that helps direct the water around the UV bulb, creating more contact time and increasing UV efficiency up to 50% over traditional UV clarifiers. Effectively clears unsightly green (pea soup) water algae blooms and is simple to use and easy to maintain, can be mounted horizontally or vertically. UltraKlear® 1000 UV Clarifier has a 14 watt bulb and is rated for ponds up to 1,000 gallons and flow rates up to 500 gal/hr.