Red Sea Reef ATO Saltwater Auto Top Off The ReefATO+ is an exceptionally reliable auto top-off system that includes a highly accurate temperature monitor plus an external leak detector and is supplied with a smart controller and useful ReefBeat features. It has a unique solid-state level sensor, with five titanium probes that can pinpoint if you are above, below, or at the desired water level, along with backup OFF sensors, a fail-safe mechanism that stops the pump if it is operating for too long, and of course ReefBeat notifications if anything is out of the ordinary. ReefBeat App The ReefBeat App allows you to set a narrow “desired” temperature range, and a slightly wider “acceptable” range, that will be seen on-line in the ReefBeat App and in the full temperature logs. In the event that the temperature goes outside the acceptable range you will get a notification to your smartphone. ATO Pump Max flow rate 300 lph / 75 gph, Max head 2.5m / 8’, power 6–10W. ReefATO Controller Connect the Leak Detector to the Emergency Quick-action for the aquarium and ReefBeat eco-system will automatically shut down other ReefBeat devices such as the ReefRun return pumps.