The Challenge The 3000 m³ water reservoir for fire extinguishing and bathing purposes was covered with filamentous algae. For years, the image of the pond was disrupted by the continuous algae growth during warm seasons. Two LG Sonic e-lines were installed to treat the waterbody. The units were connected to a local power source. The LG Sonic e-line emits specific ultrasonic parameters in order to control algae in smaller water surfaces suc

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