Flexzion UV Sterilizer Light 110V Submersible Water Clarifier Lamp Ultraviolet Filter with Bulb Tube Power Adapter for Aquarium Pond Tank Gold Fish Reef 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