Before revision:  As a first step towards characterizing stability of an electroactive-only equilibrium, we consider local asymptotic stability in a model with three types of microbes, general monotone kinetics, equal removal rates, and a general constraint .
After revision:  As a first step towards characterizing stability of an electroactive-only equilibrium, we consider local asymptotic stability of competitive exclusion by electroactive bacteria is not guaranteed, even in a simplified model .