The propensity for redox processes to occur is sometimes predicted by measured or assumed redox potential, but bulk process measurements often deviate from predictions based on the thermodynamic “redox tower” paradigm. In wetlands, dynamic hydrology, rhizosphere processes, and bioturbating animals establish heterogeneous soil redox conditions. We combined empirically measured indicators with novel electrochemical approaches to reveal redox regimes in a Great Lakes coastal estuary. Specifically, we paired zero resistance ammetry (ZRA) measured with polymer-conductive carbon electrodes with traditional redox potential measurements using platinum electrodes to detect both the potential for and actual transfer of electrons due to microbial activity. ZRA can measure electrical current that arises from microbiological activities under contrasting redox regimes, and thus can detect the distributions, extents, and kinetics of biogeochemical processes. We co-located ZRA and redox potential sensor arrays with surface water, pore water, sediment, and greenhouse gas sampling to capture short- and long-term responses to frequent flooding and drying in a shallow cove of the Old Woman Creek wetland (OWC National Estuarine Research Reserve, Huron, OH). In 2023, soil redox potential regimes responded to transient wetting and draining events as expected, but ZRA sensors revealed highly dynamic and heterogeneous microbial conditions at fine spatial and temporal scales when other tools suggested stable and homogenous conditions. Soils became oxidizing following a predictable vertical pattern as moisture was lost from the soil surface and into deeper layers, but converged at all depths to reducing conditions (~ -200mV) during and immediately after precipitation-driven rewetting events. ZRA, conversely, revealed highly variable and active microbial redox transfers between oil layers, even within 2 mm of one another, when redox potential indicated stable and homogenous conditions. Traditional biogeochemical indices including greenhouse gas fluxes, pore water chemistry, and sediment characteristics, indicate the consequences of heterogenous redox regime shaped by dynamic hydrology.