Secondary aquarium tanks are essential when your hermit crabs start to breed and the hermit crab family begins to grow. With any tank of hermit crabs there may be six to twelve members of typical family groups. Since most hermit crab enthusiasts have multiple family groups, breeding is likely to occur. Knowing the signs of when females are receptive to males and the time of the year is critical.
During March-April, there is mass breeding among hermit crabs between males and females in the community. If you have your second tank habitat prepared then you can start the process of selecting breeding pairs who stay together to rear infants. At this time, female hermit crabs nutrition requirements increase.