Electron density distribution in the V5668 Sgr ejecta for day 186 based on the optical [O III] profiles. The 4363 Å is plotted without removing the Hγ contribution for visualization purposes. The Hβ line was used to model Hγ, see text for discussion. Notice that, like the nitrogen ratios, the derived n_e is the same for the two lobes of the ejecta despite the profile asymmetries.