I am in the process of building a 180 reef tank. Currently I have control over lighting, carbon reactor, phosban reactor, closed loop both pump and valves, protien skimmer, and the return pump. Also I get Ph and Temp info from the tank currently. There is a 12 inch table top touchscreen which I am using for the user interface, once the funds become more available it will be able to be controlled from any computer, smart phone, and even an IPhone. Things left on the wish list.
Variable Control of Actinic LEDs
Control and Feedback from Calcium Reactor (do not own a Calcium Reactor yet)
Moisture sensing for emergency shutdown (have the sensor just havent had time)