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in a few of the pictures i have the water flowing at max pressure and others i have it at 60 % flow. idealy, the flow will be cut back to 40% leaving a very light water ripple effect, which will also only flow water over the side of the tank facing the display tank. i can also ad a baffle in the return to spred the return current to the side or just one side of the tank. i've built in different options for controlling the return current. by adding small pvc caps cut/drilled in differnt places, i can force the flow any direction i want which will also flow the water over that edge.
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