Matala Spectrum Ultra Violet clarifiers are made using high quality 316 stainless steel with UV stable viton seals, Philips lamps and quartz sleeve to maintain a high output of 254nm. The inside of the chamber is polished to create high UV reflection. Installation is easy using the 2″ (50mm) inlet/outlet ports and the simple design requires little maintenance. A LED display tells you if the bulb is blown. The 75w Matala Spectrum UV has a max flow of 12,000 lph and is recommended for use in ponds up to 40,000 litres or in waste water applications 7453 lph for flow rate (30mJ/cm2).Matala UVC Clarifiers are used for Koi ponds, fish ponds, aqua culture, waste water, water gardens and swimming ponds.