Axilla,
I always liked ai least a couple of powerheads opposing each other, to create a surface boil and a downforce of water where they meet.
Many moons ago when I used a wavemaker, {Tsunami}, I would have at least two of the pumps on opposite ends, operating at different times. This creates more of a chaotic current, when the current from one of these pumps intersects the current from the ones already running.
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Doug
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