The Mini 3W UVC Timer Aquarium UV Clean Light Algae Clear Fish Tank UV Water Clean Lamp Green Bloom Clean Light for Sump Pond Filter Tank is a great way to keep your aquarium clean and healthy. With a blue color and a shape that looks like a bulb, this light is perfect for keeping your fish safe from harmful toxins and contaminants. The Mini 3W UVC Timer Aquarium UV Clean Light Algae Clear Fish Tank UV Water Clean Lamp Green Bloom Clean Light for Sump Pond Filter Tank features a fluorescent light source that provides a bright, clear glow that will help to keep your fish safe and healthy. This light also has a timer function that allows you to set it to run for 3, 6, 12, or 24 hours so you can ensure your fish are getting the best possible lighting all day long.