A lot of the necessary stuff already exists for aquariums. If you search for "aquarium controller", you'll find things like this: http://www.draquarium.com/ ht

A lot of the necessary stuff already exists for aquariums. If you search for "aquarium controller", you'll find things like this: http://www.draquarium.com/ http://www.draquarium.com/ Edit: Even better (phone control, twitter notification, etc): http://www.tankedcam.com/ http://www.tankedcam.com/