I like to do pulse mode when feeding, once you set it up correctly you just have to switch to the Blue setting and hit the middle button to recall the setting. To get it going you go to blue, turn it up (probably all the way on your tank, I have an MP40 on a 30" tank and go about 3/4 power) and then hit the middle button, this sets the speed, now you set the on/off so you turn the knob all the way down and leave it for a couple seconds and then veeeeeery slowly turn the knob clockwise and watch the surface of the water. There is a very narrow window to get a good wave going. Give it a tiny turn every 5 seconds until you see a synchronized wave. Once you have the wave set, hold the middle button until the light starts slowly pulsing. When it does that it will be programmed in so you just have to hit a button to go back to the wave.
If your splashing water out of the tank go back to step 1 and turn down the power a tad (I have never splashed water out even on full blast, but it gets within a 1/8th" from going over my eurobrace on full power.