Facts about algue plants

Planktonic algae are the microscopic, single-celled, and free-floating algae that exist in the top few feet of a pond or lake where the sunlight penetrates.

This type of algae is what gives the water a green coloration. Planktonic algae are normal and are in fact desirable, because they are essential to the pond’s food chain.

Planktonic algae provide food for the microscopic animals (zooplankton) that are eaten by minnows, baitfish, and other pond inhabitants, which ultimately support a larger fish population.

Planktonic algae are the kinds of algae pond owners actually WANT and the fish NEED! It is important to manage and promote planktonic algae to build good fish populations because they provide food and oxygen for fish.
Clear water is not good if pond owners desire a heathy fish population.

source: https://site.extension.uga.edu/madison/2021/06/pond-algae-the-good-the-bad-and-the-ugly/