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Stereomicroscopy and homogenized FISH images of white and yellow granules from the Synthetic-2 reactor (a to d) on day 182 of operation and the Domestic reactor (e to h) on day 68 of operation. The FISH images show “Candidatus Accumulibacter phosphatis” in blue, “Candidatus Competibacter phosphatis” in yellow, and all other bacteria in green. Scale bars, 200 μm (a and b), 500 μm (e and f), and 20 μm (c, d, g, and h).
