Duckweed is a small, free-floating aquatic plant that is often mistaken for algae. It has tiny green leaves with a 1–2 inch thread-like root that dangles beneath the water’s surface. This plant thrives in older, nutrient-rich ponds and can rapidly multiply, forming dense mats that cover the entire water surface. When left unmanaged, duckweed can block sunlight from reaching submerged plants, deplete oxygen levels, and potentially lead to fish kills. Proper management, including nutrient control and aeration, is essential to prevent excessive growth and maintain a healthy aquatic ecosystem.