The study looked at how adding nitrate and calcium-rich water to shallow lakes can affect the growth of plants and algae. By using a computer model, researchers found that adding nitrate-rich water can reduce the amount of phosphorus in the lake, leading to more plant growth and less algae. They also discovered that when plants start growing, it can help control algae growth. The study showed that the amount of sunlight and certain nutrients in the water are important factors for plant and algae growth in lakes.