[Canadian]

From a practical standpoint in an aquarium I don't see it being feasible to create an overflow that it is so large that it creates insufficient surface tension at the typical flow rates used in aquariums with typical dimensions. I do however see overflows that are too small resulting in the majority of the water being drawn in from beneath the surface. You'd need to have a ridiculously long overflow at an incredibly low flow rate.

As a real world example: the overflow in my AIO is 4" long with a flow rate of around 225 GPH. A 3" overflow is adequate to handle that flow rate but even at 4" the surface of the water is around 3/8" above the overflow. The "velocity" of flow is great enough that it "draws" things towards it but the majority of the actual water flowing over the overflow is coming from beneath the water's surface and is therefore woefully inefficient. If I adjust the flow so that I don't get any surface agitation I can see the dust and organics accumulating on the water surface and how little of it is actually drawn over the overflow.