Fish keepers, this aquarium breeder box is an absolute essential for managing your tank population and keeping your aquatic friends safe. The large size measures approximately 20x20x20cm (7.9x7.9x7.9 inches), giving your fish plenty of room while separated from the main tank. The transparent acrylic construction lets you monitor your fish easily while maintaining water flow between compartments. The strong sucker holder with hook design keeps the box stable and secure - no more worrying about it shaking loose or falling over. You can adjust the height to find the perfect placement in your tank. Perfect for so many situations: isolating aggressive fish, protecting fry during breeding, quarantining sick fish, or keeping delicate shrimp safe from larger tank mates. The screw fixation prevents deformation over time, and the quality acrylic material is both sturdy and crystal clear. Installation is straightforward - just attach the suction cups to your tank glass and you're good to go. What's really great is how it maintains water parameters since it's inside your main tank - no separate cycling needed. The divider function lets you create multiple compartments within one box, perfect for separating different species or stages of development. If you're serious about fish keeping or breeding, this breeder box will quickly become one of your most valuable tools for maintaining a healthy, organized aquarium environment.