The Ista Hang-on Breeding Box provides a divided space that hangs onto your aquarium in order to save counter space and to keep your fish close. This space can be used as a quarantine aquarium for sick, weak, breeding or baby fish and shrimp. This box includes a cover, outlet, separation pad, L- tube, inlet, tube connector, separation base as well as a balance pad. The Breeding Box is specially made for mother fish to remain up-top while their eggs drop to the bottom away from mom. This design even allows you to use an air pump in order to circulate water, makes maintenance simple and is suitable to use with freshwater or saltwater.