What reef tank inventions would you like to see?

[Samw]

I'd like to see an invention to keep calcium at a desired level without the need to use reactors.

Something that you can just plug in and let it do its thing and refill it once in a while without too much effort. Maybe it will be in the form of a HOB container with 2 compartments where each side will store each of the 2 chemicals from the 2-part bionic calcium buffer. Then a monitor will monitor the calcium level of the tank and slowly drip each of the liquids into the tank until the optimal/desired calcium level has been reached. There will be a failsafe so that it doesn't dump too much in within a short period of time.