I have my wavebox controlled by the profilux and its set for 2 seconds....you should use your wavebox controller instead of the multi-controller, once you have it dial-in its sweet watching the softies and Anemone sway in the wave even some of your fish will swim against the wave (current) pretty cool to watch.
Oh I have mine at the blue line also remember you should have no obstruction in the path of the wave
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