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(A‐C) Images of the Algal Turf Scrubber® of HydroMentia, kindly provided by Mark Zivojnovich; (D) AlgaeWheel® system of OneWater Inc. kindly provided by Daniel Johnson and Steve Kingsland; (E) Revolving algal biofilm (RAB) system of Gross‐Wen Technologies kindly provided by Martin Gross
