In Fig. , the behavior of the ionization degree of the acidic sites, ζ a , the swelling ratio, α, and the net charge, Z net are explored under varying reservoir salt concentration, c res salt . The inclusion of salt in the system produces two effects that compete against each other in determining the microgel size, leading to a nonmonotonous swelling behavior. 7 On the one hand, adding salt to the system increases the screening, reducing the energetic penalty associated with highly ionized states of the microgel. As a consequence, a higher ionization that is closer to the ideal Henderson-Hasselbalch prediction results as c res salt increases. This is observed in Fig. , where the ionization degree, ζ a from simulations grows and approaches the ideal ionization with increasing c res salt . The higher ionization increases the local charge density of the chains, encouraging the swelling of the microgel, as observed in Fig. at low c res salt . We notice that this behavior is similar for the three different N cases, with larger ζ a and smaller α for larger N . On the other hand, the greater screening between the backbone charges, which weakens the self-repulsion between the charges and suppresses the network expansion, results in the flattening and eventual deswelling of the microgel, as observed in Fig. at high salt concentrations. We note here that the microgel deswelling with increasing salt concentration is not observed in the simulations for the salt concentrations that were studied here. Nevertheless, based on a comparison with earlier simulations of macroscopic gels, 7 we can anticipate that this effect should still occur at higher salt concentrations.