Effective density of CO₂ hydrate particles as a function of radius r_h for different thicknesses d_LO of the outer low-occupancy layer. The corresponding ice thickness for each case is reported in Table 2. For comparison, we also include as dashed and dash-dotted lines, assumed densities for the ocean water on Enceladus: Safi et al. (2017) estimated it around 1.003 g cm⁻³, while Bouquet et al. (2015) estimated it around 1.03 g cm⁻³. The crossings between the two water density lines and the curves with particle effective densities are our order of magnitude conclusions for buoyancy-driven, particle-sized, float-to-sink transitions.