Devopet Aquarium U-V Light, Al-gae Clean Light for Fish Tank, Green Water Clean Lamp with Timer, Amphibian Aquarium U-V Lamp for in-Line and in-Tank Use, for 20-40 Gallons Fish Tanks(6W)Brand: Devopet Color: Black Features: Highly Efficient Cleaning This aquarium U V light utilizes a 254nm wavelength to effectively eliminate green al gae blooms, turning cloudy green water into crystal clear clarity U V Shielded Housing Designed with a fully shielded housing, this U V light ensures no harmful U V rays escape, protecting both fish and humans Viewing Window for Easy Monitoring The housing features a convenient viewing window, allowing