Extra Large Peacock Fish Double Layer Transparent Breeding Isolation Box Aquarium Breeding Box 1. Can be used as a spawning box for livebearing fish such as bettas, guppies, medaka, and similar species 2. Helps prevent adult fish from harming fry, improving survival rates of juvenile fish 3. Provides isolation for aggressive fish, injured fish, small fish, shrimp, and clownfish in saltwater aquariums 4. Self-floating design allows for easy placement and movement, will not sink; double-layer combination saves space 5. Made from high transparency plastic material for durability 6. Clear viewing panel allows observation of fish breeding or behavior without obstruction 7. Suction cup mounting design for secure and easy installation on aquarium walls 8. Transparent plastic cover prevents fish from jumping out; includes dual round feeding holes for convenient feeding 9. 1mm gaps on the left, right sides, and bottom ensure proper water flow between the box and tank while keeping larger fish out to protect fry 10. Material: PS (Polystyrene) 11. Size: Small – approximately 8 x 7 x 11cm; Large – approximately 10 x 7 x 13cm; Extra Large – approximately 18 x 8.5 x 15.5cm 12. Weight: Small – approx. 99g; Large – approx. 138g; Extra Large – approx. 328g