Planet MEGA Matrix is a range of aquariums available in multiple sizes, including 24", 36", 48", 60", 72", 84", 96", and options like Peninsula and Rimless aquariums. Each aquarium can be customized with upgrades like Standard or Crystal Front Glass, various silicone colors, types of overflow, and background colors. They are made to order and have build times ranging from 1 to 6 weeks depending on the model.