Penn Plax Deluxe Triple Betta Bow Aquarium Tank, 0.7-Gallon The two color light system that comes with the Triple Bett-Deluxe allows your tank to transfer from night to day with a switch. Measures 4.25"D x 11.50"W x 7"H and is .7 gallons of fish fun. Features 2 color lights, filtration system, and opaque dividers.