Another item of note... I accidentally triggered one of the systems fail safe errors today. My jug of RODI water was getting low, so I removed the pump from the jug and took the jug into the other room to refill. When I got back, the alarm was sounding. It appears that the AutoAqua tried to top off my tank in the 5 minutes I was out of the room. It recognized that it was taking too long to top off, so it turned off the pump and sounded the alarm. Based on the long fill time, the AutoAqua knew that one of several things happened: 1) I was out of water, 2) the pump had failed, or 3) the sensor was not recognizing that the water level had risen. It doesn't know which specific condition happened, but it doesn't really matter. It shut the pump off so it won't burn out (if it is running dry), which also stops it from adding water so it won't over-fill (in case the sensor failed), and regardless, the alarm gets my attention so I can address the issue.