Stable, tool-free breeder box for aquariums — secure suction-cup mounting, reliable function, and even water circulation. Key benefits Secure attachment and simple setup: Installs in a variety of aquariums with suction cups — no tools required. Lightweight design allows quick repositioning while maintaining a steady hold. Optimized water flow: Evenly spaced perforations ensure smooth circulation of clean water, supporting oxygenation and healthy fish growth. Flexible isolation and management: Independent, divided sections let you separate individuals or groups for treatment, breeding, or protection. Makes feeding and monitoring straightforward. Practical for everyday use: Designed to meet common aquarium needs — containment, separation, and controlled rearing — without complex hardware or permanent changes to the tank. Important attributes Function: Multiple compartments for isolation plus perforated walls for continuous water exchange. Compatibility: Designed to be mounted inside different aquarium types and sizes using suction cups. Size and handling: Lightweight and easy to move or adjust; suitable where temporary or modular isolation is required. Performance: Provides stable containment with unobstructed water flow to promote fish health and reduce stress. Typical use scenarios Guppy breeding: Create separate compartments for broods and parents to prevent predation and improve fry survival, while maintaining water quality. Betta separation: Isolate aggressive males or prevent stress and injury during introductions without removing them from the main tank. Treatment and rearing: House injured or sick fish, pregnant females, or juvenile fish in independent sections to simplify medication, feeding, and observation. Practical notes Mounts quickly with suction cups; remove or reposition as needed. Independent compartments allow targeted feeding and easier tank management. Perforated design maintains continuous water exchange so isolated animals remain in a healthy environment.