I got my two DMP-20’s running yesterday with one criticism of the programs. I have always used random flow for my tanks, and, sadly, you can’t program the intensity of the flow when they are in this mode. This option is only available in Sine mode, Classic mode and Constant mode. Just be aware if you are dead set on wanting wave-makers running in random mode and need them running at less than 100%. They are strong, and mine are runnng at 30% in Classic mode so Random wasn’t an option.