Perfect New 36 Watt UV Sterilizer Light Water Clarifier Lamp Ultraviolet Filter with Bulb Tube Power Adapter for Aquarium Pond Tank Gold Fish Reef Flower Horn Koi Perfect New 36 Watt UV Sterilizer Light Water Clarifier Lamp Ultraviolet Filter with Bulb Tube Power Adapter for Aquarium Pond Tank Gold Fish Reef Flower Horn Koi Permanent elimination of algae bloomy so as to get rid of green water Instant control of harmful parasites and bacteria Efficient prevention of waterborne pathogens to keep the fishes and other aquatics healthy Fast reduction of unpleasant odors to improve water quality / Compact and durable structure