Space saving design Two suction cups attach securely to the inside of the aquarium wall, keeping a floating dual-layer isolation box in place. The dual-layer construction helps to maximize usable space inside the tank without crowding other fish. Easy maintenance Removable box for simple dismantling and cleaning. No tools required, making routine maintenance quick and straightforward. Versatile isolation box Clear CPANEL prevents fish from jumping out, while still allowing full visibility. Can be used as a breeding box for viviparous fish, and is especially suitable for aggressive or injured fish that need temporary separation. Must have for breeding and protection Ideal for separating pregnant breeders, protecting newborn fry from potential threats, and improving the survival rate of young fish. Use scenarios - Breeding and pregnancy: Place the female fish in the isolation box during breeding or pregnancy to keep fry safe from other tank mates until they are ready to be introduced back into the main tank. - Protection for aggressive or injured fish: Use the box to isolate aggressive partners or injured fish, reducing stress and preventing harm while they recover. - Fry safety and hatching: Utilize as a dedicated fry area or hatching box for viviparous species, providing a secure space that minimizes predation and disturbance.