Easy Use: Detachable box, easy to disassemble and . External separating hatchery for pregnant fish, protecting new born fish from being attacked, improving the survival rate of newborns fish. Creates a safe and secure breeding box for while monitors your fish easily. Space-Saving: external box, easycombination, saving space. Isolation Box: Unique clear panel, fish jumping out. Can be used as the spawning box for the viviparous fishes. Especially great for aggressive fish or fish.