Our constructed wetland treats wastewater at a sanctuary run by Free The Bears at Phnom Tamao Zoo, near Phnom Penh, Cambodia. The sanctuary collects most of its solid waste to feed on-site biodigestors, which produce biogas for cooking. However, due to health concerns, it is important to treat the wastes from the enclosures at the quarantine center seperately. This ensures that new arrivals do not spread diseases to older residents of the sanctuary. The system consists of two settling tanks, a gravel filter, an an aquatic unit filled with attractive floating and emergent plants.