Half-Moon Betta Aquarium from Imagitarium Lid with feeding hole allows easy access for feeding your betta fish or changing filter cartridges Integrated LED lighting features hidden design includes inline switch to toggle between on and off Internal power filter: Compact design includes a coconut carbon filter cartridge, suction cups and a hanger to secure to the inside of your aquarium Uses Imagitarium Replacement Coconut Carbon Filter Cartridge M, Pack of 2 (SKU 3865755) The Imagitarium HalfMoon Betta Aquarium is a 2.5gallon plastic aquarium designed to add life and excitement to your day. Let your imagination wander with the halfmoonshaped design that allows for multiple ways to display and a brilliant, energyefficient LED lighting system. This unique aquarium also includes an internal power filter with cartridges and a lid with a convenient feeding hole.