GloFish 5 Gallon Crescent Aquarium Kit 5 Gallon Curved-front aquarium with included Microfilter and Medium Bio-Bag 15 Blue LEDs in the attractive hammerhead light enhance the colors of the GloFish fluorescent fish Clear Cover Made of Acrylic Crescent shaped seamless plastic aquarium Clear plastic canopy Blue LED overhead light with Primary Material being Acrylic. Medium size filter cartridge.