majicMike has his mounted on the back not the side, facing the front of the tank, but seems to work the same. Seemed to be set to a pretty short pulse, like 2-seconds? From what I saw on his tank, the fish weren't effected in the slightest. What was cool was watching the Xenias (and other softies) sway back and forth in rythm. You also have to account for a small amount of headroom as the water level goes up and down a little bit, as the wavebox cycles. There's a small display you mount on the outside with an LED that lights green/red with each pulse.
I think fish would get more current to fight against with MP's cranked up, than they do with this Tunze.