Many laboratory experiments are based on the most realistic representation of a natural biotope. Benthic mesocosms map the water area near the ground with the inhabitants and interactions living there. In the Wadden Sea, the tide at low tide and high tide is observed. It is known to perform an inverted tide simulation in which the water level in a container is constant and a substrate plate with organisms is positioned at different heights with respect to water via a height-adjustable suspension device (06). However, a flow simulation is not performed. Therefore, the device (01) according to the invention comprises two planar tube arrangements (13, 14) which are arranged along the filling level (04) of the water (20) on opposite sides (43, 44) of the container (02) and flow openings ( 15), wherein in a first control phase (I) of the control device (12) in a pipe assembly (13) for simulating the flow conditions at low tide and in a second control phase (II) in the opposite pipe assembly (14) for simulating the flow conditions Flood water (20) is pumped and wherein the height-adjustable suspension device (06) with the control device (12) is synchronized with respect to the simulation of low tide and high tide.
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