Alfie Lifestyle Aquarium Accessory - Hang-on Nursery Fish Tank with Dual Isolation Breeding Hatchery Ideal as maturation tank for fry, or isolation tank for aggressive or injured fish Space saving design that hangs on the inside of the aquarium Removable dual-V-shape center partition provides maximum protection and allows two pregnant fish to be safely isolated Large Size - Dimension: 3.5" x 2.5" x 5" Package content: 1 separable fish hatchery, 2 suction-cups, 1 dual-V-shape center partition and 1 top cover