Penn Plax Aqua-NurseryThe Penn Plax Aqua Nursery is an automatic circulating hatchery. Once it is set up in place, theres nothing further to do until the fish are born and deposited into their seperate nursery section. The Nursery is adjustable using hangers to attach it to any aquarium rim. Automatically and gently separates mother fish from fry Nursery Tank may be lifted off platform and carried to a separate location Safe and durable plastic construction The Aqua