The V partition, which is included, is designed to help safely separate new fry from the mother. The Two-Way Guppy Breeder was engineered with wide-slotted side vents to promote water circulation that furnishes oxygen and fresh water to the fry. Side vents allow for optimum water flow. Use as amaturation tank for fry or isolation tank for injured fish or aggressive fish. High Quality, Non-Corrosive Plastic.