Aquatic plants like water hyacinth and cattail can clean up dirty water by removing pollutants like ammonia and phosphorus. When these plants are combined with a special iron-carbon filter, they work even better at purifying the water. Water hyacinth is especially good at getting rid of ammonia, while cattail is great at reducing the amount of organic matter in the water. By using a combination of these plants and the filter, the water can become much cleaner in just a few days. This method could be a helpful way to improve water quality in wetland areas.