Lee's 3-Way Multi-Purpose Guppy Breeder is an excellent and affordable medium, three-way isolated tank for guppies, live-bearers, egg-layers, and injured or aggressive fish. This breeder keeps new-born fry safe from your other aquarium fish, while providing optimal water flow, keeping the pets inside happy with a constant supply of fresh water and oxygen. Air pockets on the sides of the breeder keep it afloat on top of your tank, with a lid to keep the contents safe.