A certain type of bacteria can divide asexually every 20 minutes. This bacteria's habitat is inside of a human's mouth. A certain type of fish is able to reproduce sexually once every six months. This fish's habitat is in a lake. The human uses mouthwash, which kills 90% of the bacteria. Meanwhile, pollution is dumped in the lake, which kills 90% of the fish. How quickly will the bacteria repopulate its habitat compared to the fish?