This is my second attempt at eliminating an invasion of black crazy ants, named the Sagittarius Army, who broke into my giant grasslands ecosystem vivarium. The black crazy ants have been busy killing isopods and stealing resources from the native fauna and so I knew they had to be stopped. My method of extermination was something new I hadn't tried before, but what shocked me most was the sheer number of them living inside the great tree of the grasslands.