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Planktonic Algae-Click for more info

Planktonic algae are floating microscope plants that are normal and essential inhabitants of sunlit surface waters. There are literally millions of floating planktonic algae and these color pond water shades of green, blue-green, brown or variations in between. Planktonic algae that color the water is often called a "bloom" or "algae bloom". Many species of algae are involved in algae blooms and these species change over time based on temperature, light, nutrients, and other factors.

Planktonic algae blooms are considered desirable as the beginning of the pond food chain. In fact, fertilization programs are often used to promote algae blooms and thereby support a larger fish population. Planktonic algae is desirable for shading the pond bottom (in areas over 2 feet deep). This shading suppresses the establishment of rooted aquatic plants. However, too much planktonic algae can cause oxygen depletions and fish kills.

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