Versatile isolation box with a clear viewing panel keeps fry safe while you watch every stage of development. It serves as a spawning box for viviparous fish and a secure nursery for small fry. Key benefits Protect newborns from aggression and stress, improving survival during early life. Easy monitoring: transparent panel lets you observe behavior and feeding without handling. Safe separation for pregnant or recovering fish, reducing risk to others in the tank. Detachable design for fast setup and thorough cleaning. Compatibility and construction Compact, lightweight design compatible with most standard home aquariums. Durable, clear viewing panel and solid body for reliable use. Quick to install and remove without extra parts. Performance and practicality Creates a controlled space for fry rearing and parent management. Useful for temporary isolation during breeding, aggression management, or medical recovery. Use scenarios 1) Breeding livebearing species (eg, guppies, platies) to protect fry after birth. 2) Isolating an aggressive or stressed parent to prevent fry predation. 3) Quarantine or hospital use to monitor and care for injured or sick fish while keeping others safe. Notes Maintain water temperature similar to the main tank and monitor water quality. Detach and rinse between uses to keep the unit ready for the next cycle.