Does anyone know of a cheap but quality unit that you can connect koralia powerheads to that will switch them on and off in like 2 second intervals to mimic a vortech? I have like 4 of these damn powerheads but its just a constant flow. I want somethinf more natural without the 400$ bill next to it. Thought maybe it would be possible to run somethinf like this on a timer that can switch on an off in seconds...