Tunze osmolator nano. Set it up and forget it. Rock solid and one of the most reliable pieces of equipment I have.
All it has is a small "brain" box, a pump, and a float switch. Way easier to setup then a breakout box and float switches, and probably more reliable. I do have mine hooked up to my apex, but only to control it during feed modes(cleaning mode so when doing water changes it doesn't come on).
Not sure on pricing, but I'm going to assume(we all know what assuming means), a tunze osmolator would be cheaper then float switches a breakout box, and a pump.
Edit:
After looking up pricing, they are about even depending on what you choose for a pump, and how many float switches you end up with. With that said, you can use the breakout box for more then an ATO too.
AND HOW DO U CONNECT THE TUNZE TO THE BREAKOUT BOX????