Pet Supplies Nursery Breeding Tank Box Automatic Fish System Hatchery Baby Fish (5.25" X 4&rdquo; X 4.5&rdquo;) Aqua-Nursery is a simple, safe method of saving baby fish. The beauty of the Aqua-Nursery is that it is a completely automatic system Once it is set up in place, there's nothing further to do until the fish are born and deposited into their separate nursery section. While it is providing this service, the Aqua-Nursery also creates a constant circulation in both the maternity and the nursery sections. This eliminates the problems of stagnant water existing in most other breeding traps, and keeps the mother and the babies alive. The Aqua-Nursery will do its job quietly and confidently with no effort on your part. The world's first circulating hatchery is completely automatic.It draws new-born fry through tube from Maternity section into nursery section,keeping them separate,alive,and healthy. House other aquatic pets like shrimps, crabs or Betta.