Comparison between the flux measured by MARVIN and GANDALF for the spectra in sample 0.1 <z< 0.15. Only lines detected above a S/N threshold of 7 by both codes have been selected. Below this S/N threshold the fluxes are systematically overestimated, see discussion in the text. The false detections have been excluded in the comparison.The dashed and dotted lines are the median and standard deviation of the distributions, respectively.