Resolution study of the evolution of the magnetic field strength averaged within R₂₀₀ for the radiative (left) and non-radiative (right) simulations. We present the evolution for all four halos (shown in different colors) and compare two resolution levels: “zoom8” and “zoom12” (see text). The radiative simulation shows no significant differences between the two zoom levels for all four halos, reflecting the fact that the magnetic field is amplified predominantly in the ISM, which is well resolved in both resolutions. In the non-radiative simulation, significant differences emerge between the two zoom levels, with zoom8 simulations showing smaller growth rates and lower final field strengths for the two smaller clusters.