【High-Quality Materials】The fish tank isolation box is made of high-quality transparent plastic, high transparency, will not affect the aesthetics of your aquarium, can better observe the small fish, is durable, can be used for a long time, perfect for breeding small fish, clown fish and shrimps. 【Practical Design】The parts of the aquarium breeding box are all manually removable so that you can place dividers as needed to turn it into multiple compartments to make it hatch and isolate at the same time, and you will receive 2 suction cups that you can use to fix the isolation box on the aquarium wall or just suspend it in the water, it won't take up too much space. 【Incubation and Double Feeding Hole Design】The fish breeder box is designed with a 2mm hatching hole so that the hatched fish can easily fall into the lower compartment to prevent adult fish from attacking and improve the survival rate of the hatched fish. There are two feeding holes at the top of the fish tank isolation box, which is very convenient when feeding and prevents the fish from jumping out. 【Oxygenated Design】This fish breeder box for guppies is pneumatic, you can connect the oxygenating pump to increase the oxygen content of the water inside the tank, there are many 1mm gaps on both sides of the tank to ensure the flow of water inside the tank isolation box, also can prevent the young fish from swimming out. 【Wide Application】This fish isolation box for aquarium can be used as a spawning box to protect the hatchlings from attack, as an isolation box to isolate aggressive fish, or to place injured fish to prevent re-injury, to meet your various needs.