I'm looking at my tank right now and everyone of my plant leaves are swaying and moving due to some sort of flow.
I understand your point, but when I look at my plants they are swaying from flow coming from somewhere. Does the flow have to be uniform in it's direction to be optimal? I'm looking at my tank right now and everyone of my plant leaves are swaying and moving due to some sort of flow. Even my crypt parva, which are planted in the substrate are swaying pretty nicely so if the point is that the flow has to be in a uniformed direction then no, my sponge filter set up on the opposite side of the tank from my HOB is not contributing to flow. But if the direction of the flow doesn't have to come from the same direction then I would have to respectfully disagree just based on my observations (which may not mean a whole lot! )