All Glass Aquarium AAG21520 Fluorescent Deluxe Hood, 20-Inch Our most popular Hood is designed to perfectly compliment your All-Glass aquarium. It is custom fit to sit on the inside lip of the aquarium frame, which greatly reduces evaporation. They are designed to fit all major brands of aquariums. Our most popular Hood is designed to perfectly compliment your All-Glass aquarium It is custom fit to sit on the inside lip of the aquarium frame, which greatly reduces evaporation They are designed to fit all major brands of aquariums Our most popular Hood is designed to perfectly compliment your All-Glass aquarium It is custom fit to sit on the inside lip of the aquarium frame, which greatly reduces evaporation