On the very interesting site
http://www.amazonasrochen.de/amazonasrochen.html a ProfiLux aquarium controller which controls the system of a ray tank can be seen.
Security is achieved through a SMS module which is able to send a SMS in the case of alarms or a powercut.
They have even a film there:
http://www.amazonasrochen.de/aquarium-sicherheit.html
(click onto the photo)