Flow plays a key role in fish recruitment. River regulation can significantly disrupt the processes underpinning recruitment, ultimately impacting populations. Changes in flow regimes can alter spawning cues, degrade or disturb spawning and early life stage habitat needs, and alter food availability for resources. Flow management plans are central to efforts to restore native fish populations in regulated rivers. These plans aim to provide or maintain key hydraulic features that support the early life stages of native fish and their prey, with the broader goal of enhancing recruitment. While links between flow attributes and recruitment has been shown for several species, the pathways underpinning such links remain largely conceptual. Moreover, it remains unclear whether existing flow management recommendations can influence such flow attributes and pathways that influence recruitment. This work explores how current flow recommendations for two regulated Victorian rivers influence key hydraulic habitat attributes associated with recruitment. We use species specific hydraulic habitat needs, including their timing and duration, with hydraulic model outputs to quantify changes in habitat availability through time and space. We also use a field experiment to test how these habitats and the early life stages of fish and prey they contain, are influenced during unseasonal irrigation trade flow events, thereby testing the concepts of disturbance. Results show that currently prescribed managed flows influence key hydraulic habitat attributes associated with fish recruitment in both rivers. Flow delivery via environmental water or irrigation demand, can both enhance or disrupt important hydraulic habitat features, depending on the timing, duration and magnitude of discharge and on species-specific requirements. This work supports a shift from generic flow planning towards more nuanced, reach-specific recommendations and clearer expectations of how managed flows support—or disrupt—hydraulic habitats important for native fish recruitment.