Automatic water changes and auto top off refill tubing required question

[Tank Sinatra]

I'm currently Remodeling my basement giving me the opportunity to run lines from my current water mixing room in the basement to my aquarium on the main floor. I would like to set up automatic water changes and auto top off refill, how many lines should I run? I am currently thinking 3 quarter inch RO Tubbing lines (one salt, one fresh, one waste) and a cable to control the other top off pump. Is there anything I am missing or given the opportunity what else should I incorporate?

 

[AJsReef]

3 lines is what I ran; Fresh salt, waste, RO.

If you have a controller running a controller cable is worth the effort as well