Breakup of species contributions to the total flux in model s15p2 at 300 d. We show a stack of synthetic spectra and shade in red the flux contribution from important species (see label at top-left in each panel; this contribution also includes the continuum flux). We show the flux F_ν (in mJy) versus wavelength (in microns) for better visibility (the infrared is typically a hundred times fainter than the optical) and adopting the SN 2024ggi distance. In each row, we adjust the ordinate range in order to encompass the strongest line from the selected species.