Eco-friendly structure using the algae remover including barley straw of the present invention is formed in a cylindrical shape extending laterally floating in the water phase, the inside is hollow, the upper body is open; It is accommodated in the open upper portion of the main body, the plant material layer of the sheet form vegetation plants; And a plate-like algae removing layer formed on a lower surface of the planting layer and positioned inside the main body, wherein the lower surface of the main body has an LED light source, and through holes are formed on both side surfaces of the main body. .
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