Stacked spectra for all (top row), blue (middle row), and red (bottom row) H I non-detections in different regions of the cluster. The average stacked spectrum in each panel is indicated by the solid black, blue, and red lines. The average stacked reference spectrum is represented by the solid grey line. The green band indicates the velocity range cz ± 200 km s⁻¹ over which H I emission is expected to be seen. Only the sample of galaxies outside the r₂₀₀ (right-most column) of the cluster appear to contain detectable H I.