The AquaTop Nano-Sky Complete Aquarium System, 7 Gallon, uses high clarity glass with a 91% light-through rate vs 84% for regular glass! Whether you're into saltwater or freshwater systems, the Nano-Sky is a space-saving and stylish glass aquarium that's perfect for aquarists of all levels. The energy efficient LED lighting enhances your viewing experience by providing the shimmer of natural sunlight. The included AquaTop Zero Bypass Power Filter (3D-HOB) provides superior filtration with a pre-filter and zero bypass system that filters every drop of water so your tank stays crystal clear. With proper setup and care, the Nano-Sky offers a safe and healthy environment for your aquatic creatures to thrive.