The Marineland BIO-Wheel LED Aquarium Kit 20 gal has everything you need to create the perfect home for your fish. This 20-gallon glass aquarium is easy to set up and use. Bright white and blue LEDs beneath the sleek hinged hood show off your aquarium in the best light: white LEDs mimic the shimmering underwater effect of sunlight, while blue LEDs produce a relaxing moonlit glow for evening and nighttime enjoyment. Features a three-way switch that toggles between white and blue, off, and blue-only settings to make your aquarium come to life.This kit includes a 3-stage Marineland Penguin 150B Power Filter with BIO-Wheel filtration, 100-watt heater, fish net, thermometer and setup guide. Includes one Marineland Rite-Size B Filter Cartridge (replacement filters sold separately – change monthly for best results).