Older (i.e., larger) juveniles tend to cannibalize smaller ones, hence the need to group females together in the hatching tanks that have a similar egg stage or larval development. Juvenile red claw growth rates will vary. After four weeks a few individuals may be five times larger than others in the tank. Overall survival can be improved by grading or removing the larger juveniles. Netting or screening should be added to juvenile tanks, providing hiding places to reduce cannibalism. Any habitat that provides a large surface area, adequate water flow, and access to the bottom for feeding should improve survival. Some substrates which have been used effectively are fiberglass window screen, shade cloth, and mesh bags in which onions and citrus fruits are packaged