Bro,
You set to the blue mode(Short pulse)...
First step is to set the speed of the flow you want it to be with the control den press set..
Next Step, turn the dial that you used to control the speed to control the frequency, you should see the LED blink according to the on/off frequency.. Adjust untill you get the wave... It will take 1-2 minutes and try to off your other return and make the tank as little disturbance as possible after that den on your return...
Once confirmed, pres and hold set untill it blinks blue and green..