Ideal for breeding, isolating, or acclimatizing fish and shrimp, the Fluval Multi-Chamber Holding & Breeding Box serves as a safe and secure nursery for livebearer fish. Its space-saving, hang on design easily mounts to the exterior of your aquarium allowing for easy viewing and maintenance. With the use of an air pump (1L / minute) and airline tubing, the warm, oxygenated water from your aquarium flows continuously through the breeding box (air pump and tubing sold separately). This large size includes partition plates that allow you to create 3 separate breeding spaces. As the breeding box uses your existing aquarium's water, no additional heaters or filters are required.