The Petzilla in-Tank Aquarium Breeder Box is a great way to keep your fish healthy and increase their survival rate. Made of high-quality acrylic, this box is durable and easy to clean. The box features an in-tank design that prevents the baby fish from being attacked by the adult fish. The box also has a side vent design that allows for optimal water flow. With its authentic quality and professional breeding divider, the Petzilla in-Tank Aquarium Breeder Box is a great addition to any aquarium.