Mobile-alerts is made by a German company and meant to guard your house, but i noticed that a couple of sensors are usefull for a reeftank.
I purchased the gateway that includes a power outage sensor, which sends an alert to your phone in case of a power outage. Also available and purchased are water temperature sensors and leak detectors.
All three including the gateway was around 130 euro's (here in Europe).
Other available sensors are door-/window sensors and a weather station, and probably some more. Not for the tank but quite handy.
I purchased the gateway that includes a power outage sensor, which sends an alert to your phone in case of a power outage. Also available and purchased are water temperature sensors and leak detectors.
All three including the gateway was around 130 euro's (here in Europe).
Other available sensors are door-/window sensors and a weather station, and probably some more. Not for the tank but quite handy.