Advance Aqua Tanks Acrylic Hexagon Aquarium 15 Gallon Blue Hexagonal design allows for you to view your fish from any angle. Adds depth while maintaining a small footprint. Designed for freshwater, saltwater, or reef environments. Vivid colors of fish, plants, and marine life are enhanced with acrylic due to its greater luminosity. Acrylic aquariums are 40% brighter, 17% stronger, and 50% lighter than glass aquariums