Do you get high water alarms and overflow on the sides? I do….I ran a Clarisea before the reefmat which only overflowed if the motor wasn’t turning when the sensor was triggered.I'm back and forth. I've heard it advance on its own several times. But there's also been times when the water is up at the sensor for an extended period of time and it does nothing. But my tank is new so there's not a lot to be skimmed out at this point.