100-150 small, live Duckweed (Lemna Minor) plants. Common Duckweed is a floating aquatic plant. It is a monocot and rich in protein and fats which make it an important natural food resource for many fish and birds (notably ducks). Grows optimally in high nutrient water with pH between 5 and 9; with temperatures between 42 and 90 degrees fahrenheit (6 to 33 celcius).
Each duckweed plant has 1-3 leaves (1/16-1/8 inches long) and each leaf has a single root hanging down.